Repairing material of Betleaf meridian as well as repairing method and application of repairing material

Abstract

The invention relates to the technical field of cultural relic repair, in particular to a repair material of a Betyesian channel and a repair method and application thereof. The invention discovers and reports a method for repairing the bay leaf through a specific binder A, bay leaf powder, bay leaf fiber strips, bay leaf patch blocks and bay leaf pulp for the first time. Compared with the prior art, the repairing method has the advantages that the thickness and the color of the repaired part are similar to those of the Betleaf meridian body, joints are natural, the whole appearance is attractive, the Betleaf meridian can recover the original appearance, and the Betleaf meridian can be conveniently and continuously browsed and stored for a long time; and the repairing method is reversible, the cultural relics can be conveniently removed without causing secondary damage to the cultural relics, and the repairing principle and concept of relic repairing, renovation, minimum intervention, reversibility and safety are met.

Description

Technical Field

[0001] The present invention relates to the technical field of cultural relics restoration, and in particular to restoration materials for palm leaf scriptures, and a restoration method and application thereof. Background Art

[0002] Palm leaf manuscripts are a form of writing written on palm leaves (Palmata leaves, also known as palm leaves). They are also called "Palm Leaf Manuscripts" (PLMs). Because most of the content recorded is Buddhist scriptures, they are called Palm Leaf Manuscripts. The rich content recorded in the Palm Leaf Manuscripts and the unique writing and binding form have extremely high cultural, historical and artistic values, and are an important part of the ancient books of ethnic minorities.

[0003] As an organic material, the palm leaf scriptures are prone to matrix deterioration, biological erosion, physical damage, etc. due to their own aging and degradation, external environmental influences (especially the hot and humid climate in South Asia and Southeast Asia), and various improper operations or unexpected accidents during the thousands of years of preservation. Common diseases of palm leaves include pollution, insect infestation, breakage, loss, and stringing, which affect the use and long-term preservation of the palm leaf scriptures. (Journal of the National Museum of China, 2020, (08): 147-160.)

[0004] At present, there are no reports on the methods and materials for the restoration of palm leaf scriptures in China. The methods and materials for the restoration of palm leaf scriptures abroad mainly include the following (Chinese Tibetan Studies, 2022, (04): 165-178+220.): 1. Repair of insect holes: Mix handmade paper fibers with methyl cellulose and other adhesives and stuff them into the holes for filling (Conservation of Manuscripts and Paintings of South-cast Asia. 1984: 24-62.); 2. Repair of cracks or ruptures: Use thin paper or gauze with starch paste, methyl cellulose, acrylic emulsion, fish glue and other adhesives for repair (Studies in Conservation, 1958, 3 (3): 135-140; Restaurator, 1969, 1 (2): 105-114; The Paper Conservator, 2004, 28 (1): 105-109; The Book and Paper Group Annual, 2009, 28: 83-97); 3. Repair of larger missing pieces: 1) Patching method: thin the palm leaf and the missing edge as the patch respectively, overlap the edges and glue them with polyvinyl acetate emulsion (Conservation of Manuscripts and Paintings of South-cast Asia. 1984: 24-62.); 2) Inlay method: trim the palm leaf into a shape that fits the missing part, and use resin wood glue to glue the patch and the missing part. (Library Conservation News, 1987, (16): 4-7; 1987, (17): 4-5.) 4. Other methods: use wood chips, bark and other materials as filling materials. (Restaurator, 1969, 1 (2): 105-114; The Paper Conservator, 2004, 28 (1): 105-109.) By comparison, the repair methods mentioned in foreign literature are different from the method of the present invention.

[0005] The existing palm leaf restoration technology has the following problems:

[0006] First, the restoration effect is poor, which is mainly reflected in the use of materials that are different from the original materials of the Palm Leaf Sutra. These materials cannot restore the original appearance of the Palm Leaf Sutra well.

[0007] Second, there are hidden dangers in the safety and stability of repair materials. For example, adhesives such as acrylic emulsion, polyvinyl acetate emulsion and resin wood glue are irreversible after curing, which increases the risk and uncertainty of repair.

[0008] Third, the current restoration technology does not beautify the seams, and the restored palm leaf scriptures have obvious signs of repair on the surface.

[0009] Fourth, the existing methods do not classify and treat the specific diseases of the palm leaf scriptures, and lack targeted restoration measures.

[0010] Therefore, providing a restoration method that can restore the original appearance of the palm leaf scriptures and has both high safety and stability has far-reaching practical significance and historical and cultural value. Summary of the invention

[0011] In view of this, the present invention aims to provide a repair material and a repair method and application of a palm leaf scripture, so that the method can accurately repair and the repaired scripture is more beautiful. The repair method provided by the present invention can restore the palm leaf scripture to its original appearance, the thickness and color of the repaired part are similar to the palm leaf scripture body, the seams are natural, the repair effect is good, and it is easy to continue to read and preserve for a long time.

[0012] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0013] Materials for repairing the palm leaf sutra, comprising material 1 for repairing small wormholes and material 2 for repairing large wormholes;

[0014] The material 1 is a palm leaf pulp made of a binder A and palm leaf powder;

[0015] The material 2 includes a binder A, palm leaf powder and palm leaf fiber strips;

[0016] The binder A is an animal protein glue solution; the animal protein glue includes at least one of gelatin, fish glue, hide glue and bone glue;

[0017] In the palm leaf pulp, the mass ratio of the binder A to the palm leaf powder is 1:(2-10).

[0018] In the present invention, the material for repairing the palm leaf sutra also includes a material 3 for repairing cracks;

[0019] The material 3 includes the binder A and palm leaf powder.

[0020] In the present invention, the material for repairing the palm leaf sutra also includes a material 4 for repairing the defective part; the material 4 includes a palm leaf patch, the adhesive A and palm leaf powder.

[0021] Wherein, the palm leaf patch is a palm leaf with a color close to that of the defective part obtained by artificial accelerated aging treatment or dyeing and aging treatment. In the present invention, the artificial accelerated aging treatment is a treatment at 100-150°C or 60-80°C 50-70% RH for 3 hours to 240 hours. In the present invention, the dyeing and aging treatment is: using mineral dye ochre, plant dye gamboge and ink to dye the palm leaf in turn, and finally brushing with alum water to fix the color; the alum water used is made of deionized water, gelatin and alum, wherein the mass ratio of gelatin to alum is 1:1 to 3:1.

[0022] In the present invention, the material for repairing the palm leaf warp also includes a material 5 for repairing the edge wire drawing area; the material 5 includes a palm leaf patch and the adhesive A.

[0023] In the above materials 1 to 5, the formula composition of the binder A involved is the same, and the preparation method and particle size of the bay leaf powder involved are also the same.

[0024] In the present invention, the palm leaf fiber strips are palm leaf fibers with a length of 2 mm to 5 mm. In a specific embodiment of the present invention, the palm leaf fiber strips are prepared by the following method: the palm leaves are crushed and screened with a 40-mesh screen, leaving the palm leaf fiber strips with a length of 2 mm to 5 mm.

[0025] In the present invention, the binder A is an animal protein glue solution with a mass fraction of 20% to 30%. The mass fraction of the animal protein glue solution can be 20%, 25%, or 30%. The animal protein glue preferably includes at least two of gelatin, fish glue, hide glue, and bone glue; in some specific embodiments of the present invention, the animal protein glue includes gelatin and hide glue; in a specific embodiment of the present invention, the animal protein glue includes gelatin and hide glue in a mass ratio of 1:1.

[0026] In the present invention, the palm leaf powder is a palm leaf powder that has passed through a sieve of 60 mesh or more, preferably a sieve of 60-200 mesh, specifically 60 mesh, 80 mesh, 100 mesh, 120 mesh, 140 mesh, 160 mesh, 180 mesh, 200 mesh. In a specific embodiment of the present invention, the palm leaf powder is prepared by the following method: crushing the initially aged or "old" palm leaves through a sieve of 60 mesh or more to obtain the palm leaf powder.

[0027] The palm leaf sutra is repaired by using the palm leaf pulp, palm leaf fiber strips, palm leaf powder and palm leaf patch provided by the present invention. After the repair material is cured, it is close to the main body of the palm leaf sutra, with natural seams and overall beauty. The palm leaf sutra can be restored to its original appearance, which is convenient for continued reading and long-term preservation.

[0028] The present invention also provides application of the above-mentioned material in repairing palm leaf scriptures.

[0029] In the application of the present invention, the repair includes at least one of repairing small wormholes, repairing large wormholes, repairing cracks, repairing defective parts and repairing edge wire drawing parts. Those skilled in the art can select corresponding materials for repair according to the repaired parts.

[0030] The present invention also provides a method for repairing palm leaf scriptures using the above-mentioned materials for repairing palm leaf scriptures.

[0031] Furthermore, the method for repairing palm leaf scriptures comprises the following steps:

[0032] (1) Classification of damaged palm leaf sutras: The damaged parts of the palm leaf sutras are divided into the following categories: Size < 4 mm 2 Small wormholes, sized between 4 and 25 mm 2 The large wormholes, cracks, defects and edge wire drawing areas between them;

[0033] (2) Repairing small wormholes with material 1: Fill the small wormholes with bay leaf pulp, absorb water and press, and then shape and post-process;

[0034] (3) Repairing the large wormhole with material 2: After applying adhesive A on the edge of the wormhole, fill the wormhole with palm leaf fiber strips; then apply adhesive A on both sides of the fiber strips and fill with palm leaf powder; finally, perform shaping and post-processing;

[0035] (4) Repair the cracked area with material 3: Apply adhesive A to the edge of the crack and evenly fill it with palm leaf powder, and then perform shaping and post-processing in turn;

[0036] (5) Repairing the defect with material 4: 1) Taking artificial accelerated aging or dyed palm leaves, making a palm leaf patch with the same shape and size as the defect; 2) Applying adhesive A to the edge of the palm leaf patch, aligning and sticking it to the defect of the palm leaf to be repaired, and evenly filling the front and back of the bonding place with palm leaf powder; 3) Shaping and post-processing;

[0037] (6) Use material 5 to repair the edge brushed area: Take the palm leaves that have been artificially accelerated aged or dyed to make a palm leaf patch with the same shape and size as the defective area; after combing and brushing, place the palm leaf patch between the upper and lower layers of the brushed wire to cover the defective area and fit it tightly, and evenly apply adhesive A on the brushed area; finally, perform shaping and post-processing.

[0038] In steps (5) to (6), the artificial accelerated aging or dyeing of the old palm leaves is carried out at 100 to 150° C. or 60 to 80° C. and 50 to 70% RH for 3 to 240 hours;

[0039] The dyeing and aging process is as follows: the mineral dye ochre, the plant dye gamboge and ink are used to dye the palm leaves in sequence, and finally alum water is applied to fix the color.

[0040] The gelatin alum water is made of deionized water, gelatin and alum, wherein the mass ratio of gelatin to alum is 1:1 to 3:1.

[0041] In steps (2) to (6), the shaping is as follows: a plastic film is placed above the repair area, and a fingernail or a shaping tool is used to gently rub back and forth on the surface of the repair area to shape a natural seam and a smooth surface;

[0042] The post-treatment includes: pressing, fixing, drying and curing steps; the pressing, fixing, drying and curing steps include: applying a uniform pressure of 1 kg to 5 kg and maintaining it for 3 to 24 hours.

[0043] The palm leaf scriptures may also encounter diseases during storage. In view of this situation, the repair method provided by the present invention also includes the steps of disinfection and pest control, removal of sticky palm leaves, cleaning and decontamination, color reinforcement and deacidification before classification and repair.

[0044] The present invention provides materials, a repair method and an application for repairing a palm leaf sutra. Experiments show that the repair method of the present invention has the following advantages:

[0045] 1. It can restore the palm leaf scriptures to their original appearance, making them easier to read and preserve for a long time.

[0046] 2. The repair effect is good. The thickness and color of the repaired part are similar to the main body of the Bayeux Sutra. The seams are natural and the overall appearance is beautiful.

[0047] 3. The method of repairing the Palm Leaf Sutra is to minimize direct intervention on the Palm Leaf Sutra while ensuring its safety and stability, and avoid excessive cleaning and unnecessary changes.

[0048] 4. The restoration method is reversible and can be easily removed without causing secondary damage to the cultural relics. It complies with the restoration principles and concepts of restoring cultural relics to their original state, minimal intervention, reversibility, and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the process of the palm leaf sutra repairing method of the present invention;

[0050] Figure 2 Comparison results before and after using the repair method of the present invention to repair the wormholes and cracks in the Bayeux Sutra;

[0051] Figure 3 The before and after comparison results of repairing the defective part of the palm leaf meridian using the repair method of the present invention;

[0052] Figure 4 The before and after comparison results of repairing the edge drawing part of the palm leaf meridian using the repair method of the present invention;

[0053] Figure 5 Compare the colors of the palm leaves treated by different methods with the colors of the palm leaves to be restored;

[0054] Figure 6 The step of repairing the defective part according to the present invention;

[0055] Figure 7 The effect of repairing the defective part according to the present invention;

[0056] Figure 8 Comparison of the effects of using palm leaf pulp to repair defective parts and using the repair method of the present invention to repair defective parts of the palm leaf meridian during the research process of this application;

[0057] Figures 9 to 11 The effect comparison between the prior art 1 to 3 palm leaf sutra repair methods and the palm leaf sutra repair method of the present invention is shown. DETAILED DESCRIPTION

[0058] The present invention provides a repair material for palm leaf scriptures and a repair method and application thereof. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve it. It is particularly important to point out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application of this article without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0059] Unless otherwise specified, the test materials used in the present invention are all common commercial products and can be purchased on the market. For example, the animal protein glue (gelatin, fish glue, hide glue, bone glue) used to prepare the adhesive A are all common commercially available materials, such as Jiang Sixu Tang brand super gelatin, common commercially available sturgeon glue, Jiang Sixu Tang brand cowhide glue, etc.

[0060] The present invention provides a repair material for a palm leaf scripture, including palm leaf pulp, palm leaf fiber strips, palm leaf powder, palm leaf patch blocks and adhesive A, and one or more of them are used to repair small wormholes, large wormholes, cracks, defects and edge wire drawing parts of the palm leaf scripture. The repair materials are as follows:

[0061] (1) Binder A and bay leaf slurry: Bay leaf slurry is made by mixing binder A and bay leaf powder. The specific operation steps are as follows: 1. Prepare 20% to 30% animal protein glue (gelatin, fish glue, hide glue, bone glue, etc.), and the specific steps include: a. Weigh the animal protein glue according to the required concentration. b. Put the animal protein glue in a bowl, inject cold water, just immerse the animal protein glue, and soak for 20-30 minutes to allow it to fully absorb water and expand. c. Inject 60℃ to 70℃ hot water into the glue, stirring continuously until it is fully dissolved to obtain binder A binder. 2. Crush the initially aged "old" bay leaves, and sieve them through a 60-mesh or above sieve to make bay leaf powder. The finer the sieve, the better the effect. 3. Mix the binder A prepared above with bay leaf powder in a ratio of 1:3 to make bay leaf slurry.

[0062] (2) Palm leaf fiber strips: The palm leaves are crushed and sieved with a 40-mesh sieve to obtain palm leaf fiber strips with a length ranging from 2 mm to 5 mm.

[0063] (3) Palm leaf powder: Grind the initially aged “old” palm leaves through a sieve with a mesh size of 60 or above to make palm leaf powder. The finer the mesh, the better the effect.

[0064] (4) Palm leaf patch: Palm leaves that have been dry-heat treated at 120°C for 10 days and still retain a certain degree of strength and toughness, or palm leaves that have been aged by dyeing. The dyeing materials and methods are as follows: Use mineral dye ochre, plant dye gamboge and ink, dye through multiple shading, and finally brush on alum water to fix the color.

[0065] Among the repair materials described in the present invention, the original materials for preparing palm leaf powder, palm leaf fiber strips and palm leaf patches are all newly made palm leaves, that is, newly processed palm leaves, which can be obtained commercially or processed by themselves according to common methods in the art. For example, the processing method can be: cutting the palm leaves from the tree, steaming them in water, then taking them out to dry, scraping off the uneven places with a knife, and cutting them into pieces according to the required specifications for later use.

[0066] The present invention also provides a method for repairing palm leaf scriptures, including classification and repair and reinforcement of damaged palm leaf scriptures. The specific steps include:

[0067] Step 1: Damage to the palm leaf sutra can be divided into the following five categories:

[0068] (1) Size: 4mm 2 Small wormholes within range;

[0069] (2) Size: 4mm 2 Up to 25mm 2 Large wormholes within range;

[0070] (3) Crack location;

[0071] (4) defect location;

[0072] (5) Brushed edge area.

[0073] Step 2: Repair and reinforce the palm leaf, including:

[0074] (I) Repairing small wormholes: Mix adhesive A with palm leaf powder to make palm leaf slurry, fill the small wormholes, use absorbent paper to absorb moisture and press to make it compact. Before the repair material solidifies, perform surface shaping treatment to make its thickness close to the surrounding area, so as to restore the original shape of the palm leaf scripture;

[0075] (II) Repairing large wormholes: First, apply adhesive A to the edge of the wormhole, and then fill the palm leaf fiber strip into the wormhole. After applying adhesive A evenly on both sides of the fiber strip, fill it with palm leaf powder and press it tightly. Before the repair material solidifies, perform surface shaping treatment to make its thickness similar to the surrounding area, thereby restoring the original shape of the palm leaf scripture;

[0076] (III) Repair the cracks: First, apply adhesive A inside the cracks, then fill the front and back sides of the cracks with palm leaf powder and press them tightly. Before the repair material solidifies, perform surface shaping to make its thickness similar to the surrounding area, thereby restoring the original shape of the palm leaf scripture;

[0077] (IV) Repair the defect: First, trim the palm leaf patch into a shape that fits the defect. Then, apply adhesive A to the edge of the defect and bond the palm leaf patch to the defect. Fill the joint with palm leaf powder and press it tightly. Perform surface shaping before the repair material solidifies to restore the original shape of the palm leaf sutra.

[0078] (V) Repair the edge of the brushed area: First, trim the palm leaf patch into a shape that matches the brushed area. Then, comb the brushed area into two layers, upper and lower, and place the palm leaf patch between the two layers. Apply adhesive A to the joint and perform surface shaping before the repair material solidifies to restore the original shape of the palm leaf sutra.

[0079] Specifically, the repair methods for each part are as follows:

[0080] (I) Repairing small wormholes

[0081] (1) Preparation of bay leaf slurry: First, prepare binder A: use a 20% to 30% by mass animal protein glue solution, such as one or a combination of gelatin, fish glue, hide glue, and bone glue to form binder A; secondly, crush the bay leaves that have been artificially accelerated to age, and sieve them through a 60-mesh or larger sieve to obtain bay leaf powder. The binder A prepared above and the bay leaf powder are evenly mixed in a ratio of 1:2 to 1:10 to prepare bay leaf slurry.

[0082] (2) Apply palm leaf slurry: Apply the palm leaf slurry evenly on the area that needs to be repaired to absorb excess moisture and make the thickness of the repaired area similar to the surrounding area. Cover the repaired area with a clean plastic film and then apply a uniform pressure of 1 kg to 5 kg and maintain for 3 to 24 hours to help restore the original shape of the palm leaf sutra.

[0083] (II) Repairing the Big Wormhole

[0084] (1) Apply Adhesive A: Apply Adhesive A evenly to the damaged edge and wipe off the excess Adhesive A.

[0085] (2) Filling with palm leaf fiber strips: crush the palm leaves that have undergone artificial accelerated aging treatment, obtain the palm leaf fiber strips with a length ranging from 2 mm to 5 mm after screening with a 40-mesh sieve, evenly distribute them in the wormholes, and apply adhesive A on the palm leaf fiber strips again.

[0086] (3) Filling with palm leaf powder: The palm leaf powder sifted through a sieve of 60 mesh or above is evenly applied on the palm leaf fiber strips and fully combined with the adhesive A to enhance the structural stability of the repair area.

[0087] (4) Shaping and post-processing: Rub the surface of the repaired area back and forth to make it smooth, cover the repaired area with a clean plastic film, and then apply a uniform pressure of 1 kg to 5 kg and maintain it for 3 to 24 hours to help restore the original shape of the palm leaf scripture.

[0088] (III) Repair cracks:

[0089] (1) Apply adhesive A: Apply adhesive A evenly on the edge of the crack.

[0090] (2) Filling with palm leaf powder: The palm leaf powder sifted through a sieve of 60 mesh or above is evenly filled on the front and back sides of the adhesive A and fully combined with the adhesive A to enhance the structural stability of the repair area.

[0091] (3) Shaping and post-processing: Rub the surface of the repaired area back and forth to make it smooth, cover the repaired area with a clean plastic film, and then apply a uniform pressure of 1 kg to 5 kg and maintain it for 3 to 24 hours to help restore the original shape of the palm leaf scripture.

[0092] (IV) Repair of defective parts

[0093] (1) Trimming the palm leaf patch and the gap: Place the palm leaf to be repaired on the palm leaf patch, and then use a needle awl to pierce a shape that fits the defect along the damaged shape, or cut a corresponding shape on the palm leaf patch along the edge of the defect, and remove the stubble on the edge of the defect and the edge of the palm leaf patch.

[0094] (2) Apply adhesive A: Apply adhesive A evenly on the edge of the palm leaf patch, align and stick it to the defective part of the palm leaf to be repaired, and the two are tightly combined. The palm leaf powder screened through a 60-mesh or higher sieve is evenly filled on the front and back of the bonding area and fully combined with adhesive A to enhance the structural stability of the repair area.

[0095] (3) Shaping and post-processing: Rub the surface of the repaired area back and forth to make it smooth, cover the repaired area with a clean plastic film, and then apply a uniform pressure of 1 kg to 5 kg and maintain it for 3 to 24 hours to help restore the original shape of the palm leaf scripture.

[0096] (V) Repair the edge brushing area

[0097] (1) Trimming the palm leaf patch: Place the palm leaf to be repaired on the palm leaf patch, and then use a needle awl to pierce a shape that fits the defect along the damaged shape, or cut a corresponding shape on the palm leaf patch along the edge of the defect.

[0098] (2) Combing and drawing: Wet the palm leaf drawing wire with water, use tweezers to straighten the edge of the palm leaf and draw the wire, then absorb the water to make the palm leaf wire smooth and smooth.

[0099] (3) Filling the bay leaf patch: Place the bay leaf patch accurately between the upper and lower layers of the wire drawing to ensure that it completely covers the defect and fits tightly. Apply adhesive A evenly on the wire drawing area.

[0100] (4) Shaping and post-processing: Rub the surface of the repaired area back and forth to make it smooth, cover the repaired area with a clean plastic film, and then apply a uniform pressure of 1 kg to 5 kg and maintain it for 3 to 24 hours to help restore the original shape of the palm leaf scripture.

[0101] The binder A refers to an animal protein glue solution with a mass fraction of 20% to 30%, and the animal protein glue is one or a mixture of two of gelatin, fish glue, hide glue and bone glue; water refers to deionized water.

[0102] The palm leaf powder refers to the palm leaves that are well-shaped and uncarved, which are crushed by a wall-breaking machine after artificial accelerated aging treatment and sieved through a sieve of 60 mesh or above to become palm leaf powder.

[0103] The palm leaf pulp refers to the palm leaf pulp prepared by uniformly mixing the binder A prepared above and the palm leaf powder in a mass ratio of 1:2 to 1:10.

[0104] The palm leaf fiber strips refer to the palm leaf fiber strips with a length ranging from 2 mm to 5 mm remaining after the palm leaves are crushed and screened with a 40-mesh sieve;

[0105] The palm leaf patch refers to a palm leaf that is well-shaped and uncarved and is obtained through artificial accelerated aging treatment or dyeing and aging treatment.

[0106] The specific method of absorbing water and pressing is: Cover the repair area with a clean absorbent paper to ensure that the absorbent paper completely covers the repair area. Gently press the absorbent paper to absorb excess water. When pressing, use your palm to apply even force to ensure that the moisture in the entire repair area is fully absorbed by the absorbent paper. To prevent sticking, sprinkle a layer of palm leaf powder on the repair area;

[0107] The specific method of the surface shaping treatment is: gently rubbing back and forth on the surface of the repair area to shape a natural joint and a smooth surface;

[0108] The specific method of pressing and fixing is to place a clean absorbent paper or plastic film on the palm leaf scripture and cover it with a clean book pressing board. Then place a heavy object on the book pressing board, and the repaired area is subjected to a uniform pressure of between 1 kg and 5 kg to further shape and keep it flat. Keep it for 3 to 24 hours to ensure that the adhesion part is completely dried and cured. During this process, the absorbent paper can be replaced to avoid adhesion.

[0109] The artificial accelerated aging treatment refers to treatment at 100-150°C or 60-80°C 50-70% RH for 3 hours to 240 hours;

[0110] The dyeing and aging treatment refers to dyeing with mineral dye ochre, plant dye gamboge and ink in sequence, and finally brushing with alum water to fix the color.

[0111] The palm leaf sutra restoration method may further include the following steps: disinfection and insecticide treatment of the palm leaf sutra, removal of sticky palm leaves, cleaning and decontamination, color reinforcement and deacidification treatment before step 1. After step 2, the palm leaf sutra may be leveled, and display and preservation measures may be taken.

[0112] After solidification, the palm leaf sutra repair material has a thickness and color similar to that of the palm leaf sutra and is reversible.

[0113] The repair material is a material whose color is consistent or close to the surface color of the palm leaf sutra body after curing.

[0114] The palm leaf sutra repair method is preferably used for a damaged ancient palm leaf sutra; and before step 1, it also includes disinfection and insecticide treatment of the palm leaf sutra, peeling of stuck palm leaves, cleaning and decontamination of the palm leaf sutra, color reinforcement treatment and deacidification treatment of the palm leaf sutra; after step 2, it also includes step 3 of flattening the palm leaf sutra and step 4 of displaying and preserving the palm leaf sutra.

[0115] In the palm leaf sutra repair method, preferably, the thickness and color of the repaired part are similar to those of the palm leaf sutra body, and the seams are natural.

[0116] The restoration method of the present invention complies with the principles and concepts of "restoring the old as it was", "safety", "reversibility" and the use of raw materials for cultural relics restoration. It is specifically reflected in the following aspects:

[0117] First, the same materials as the main body of the palm leaf sutra are used for restoration. The palm leaf pulp, palm leaf fiber strips, palm leaf powder and palm leaf patch blocks used in this method are all made of the main body of the palm leaf sutra, which preserves the original appearance of the cultural relic to the greatest extent, and conforms to the concept of raw material use in cultural relic restoration and the principle of "restoring the old as it was".

[0118] Secondly, the adhesive A used in this method is reversible under high temperature and high humidity conditions, which means that the repair work can be safely removed or re-performed if necessary in the future, ensuring the reversibility and safety of the repair work;

[0119] Thirdly, the thickness and color of the repaired part of the palm leaf sutra repair method of the present invention are similar to those of the palm leaf sutra itself, and the visual effect after repair is highly consistent with the original, which ensures the concealment and coordination of the repair, and further embodies the concept of "restoring the old as it was".

[0120] In short, the present invention strictly follows the scientific principles of cultural relic restoration in terms of material selection and restoration technology, which not only ensures the safety of the restoration process, but also ensures the reversibility of the restoration effect and the concept of raw material use.

[0121] The present invention will be further described below in conjunction with embodiments:

[0122] Example 1 Repair material of the present invention

[0123] (1) Binder A and bay leaf slurry: Bay leaf slurry is made by mixing binder A and bay leaf powder. The specific operation steps are as follows: 1. Prepare 20% to 30% animal protein glue (gelatin, fish glue, hide glue, bone glue, etc.), and the specific steps include: a. Weigh the animal protein glue according to the required concentration. b. Put the animal protein glue in a bowl, inject cold water to just immerse the animal protein glue, and soak it for 20-30 minutes to allow it to fully absorb water and expand. c. Inject 60℃ to 70℃ hot water into the glue and stir continuously until it is fully dissolved to obtain binder A. 2. Crush the initially aged "old" bay leaves and sieve them through a 60-mesh or above sieve to make bay leaf powder. The finer the sieve, the better the effect. 3. Mix the binder A prepared above with bay leaf powder in a ratio of 1:3 to make bay leaf slurry.

[0124] (2) Palm leaf fiber strips: The palm leaves are crushed and sieved with a 40-mesh sieve to obtain palm leaf fiber strips with a length ranging from 2 mm to 5 mm.

[0125] (3) Palm leaf powder: The initially aged “old” palm leaves are crushed and sieved through a 60-mesh or larger sieve to obtain the palm leaf powder. The finer the sieve holes, the better the effect.

[0126] (4) Palm leaf patch: Palm leaves that still retain a certain strength and toughness after being dry-heat treated at 120°C for 10 days, or palm leaves that have been aged through dyeing.

[0127] Among them, the dyeing materials and methods are as follows: use mineral dye ochre, plant dye gamboge and ink, dye through multiple shading, and finally brush on gelatin and alum water (the mass ratio of gelatin and alum is 3:1) to fix the color.

[0128] Example 2 Repair method of the present invention

[0129] The restoration of the palm leaf scriptures using the restoration material of Example 1 includes the following two situations:

[0130] First, when no disease is encountered, the repair method of the present invention includes the following steps 6 to 9.

[0131] Second, when encountering the following disease conditions, the repair method of the present invention includes the following steps 1 to 9, and the repair process is as follows: Figure 1 shown.

[0132] The pests and diseases include: 1. Pests and mildew. Palm leaves are natural organic matter and are extremely susceptible to pests and mildew, especially in hot and humid areas such as India, Myanmar, Laos and Yunnan, my country. The high temperature and high humidity environment in these areas provide favorable conditions for the reproduction of insects and mildew, resulting in the accelerated deterioration of palm leaf materials. Pests mainly manifest themselves in eating away at palm leaves, causing structural damage to the material; mildew will cause spots, discoloration and softening on the surface of the palm leaves, further weakening its strength and toughness; 2. "Palm leaf scripture bricks". Due to the tightly bound storage method of the palm leaf scriptures, the essential oils applied to the surface of the leaves, the glue contained in the handwriting, and factors such as high humidity, dust, and mildew, the palm leaves often stick together, and in severe cases even become hardened into blocks; 3. Severe pollution. Dust and ash accumulation is a common problem with palm leaves, which not only affects their appearance, but also leads to fiber degradation, color changes and microbial growth, further accelerating their aging and damage process; 4. Colorant falls off. The surface of the palm leaf sutra has weak water absorption and poor fixation on the ink. Compared with paper, the palm leaf sutra is more prone to color shedding. In addition, the binder components in the ink will age over time, and the mutual friction between the leaves and the generation of surface cracks will cause the handwriting or pigment to often wear, warp or peel off. 5. Severe acidification. Like paper, the palm leaf sutra has the problem of acidification and degradation, and acid migration will occur during long-term storage, aggravating the degree of acidification and further damaging the preservation of the palm leaf sutra; 6. Warping. In the absence of a sutra plywood or long-term exposure to sunlight and dry environment, the palm leaf sutra is prone to warping. In addition, wrinkles and creases are caused by improper manual operation; 7. Damage to the binding. During long-term use and storage, broken threads, broken plywood, and damaged sutra cloth will occur. Step 1, disinfection and insecticide of the palm leaf sutra to be repaired: Use low-temperature freezing insecticide to place the palm leaf sutra to be repaired in a low-temperature environment of -20℃ to -30℃ for several days to several weeks to kill insects and their eggs. For small areas of mold on the palm leaf, use a cotton swab dipped in ethanol to wipe it off;

[0133] Step 2, peeling and sticking of the palm leaf sutra: local steam method combined with pot steaming method. First, use a thermostatic steam spray pen to generate steam by heating water, and accurately spray steam through the spray pen to soften the local area. The thermostatic steam spray pen can adjust the temperature of the steam as needed to adapt to the thickness, type of cement and degree of adhesion of different palm leaf sutras. For palm leaves with severe overall adhesion, the pot steaming method is used. The specific steps are as follows: first wrap the palm leaves with steamer cloth. The cloth material is safe, high temperature resistant, non-sticky and breathable. Then put the wrapped palm leaves in the steamer and steam for a few minutes to half an hour. The specific time needs to be adjusted according to the specific situation of the palm leaf sutra, including its thickness, type of cement and degree of adhesion. Allow the steam to fully penetrate the palm leaves, soften and separate the cement. After taking out the palm leaves, let them cool slightly and peel them separately before the palm leaves cool and harden again.

[0134] Step 3: Clean and decontaminate the palm leaf sutra: Use a soft brush to clean loose dust and dirt on the surface; use a moistened cotton swab to gently wipe the heavily contaminated areas, avoiding the text and patterns on the surface of the palm leaf sutra;

[0135] Step 4: Reinforce the palm leaf with pigment: Use glue and alum water (the ratio of glue and alum is 3:1) to reinforce the pigment. The specific operation is as follows: first, use a soft brush to dip an appropriate amount of glue and alum water, and then evenly apply the glue and alum water to the palm leaf's writing and pattern. Be gentle when applying, and avoid excessive brushing to damage the writing and pigment;

[0136] Step 5, deacidification of palm leaf sutras: For palm leaf sutras that are severely polluted and acidified, it is recommended to use hot water immersion method for treatment with caution, depending on the solubility of the ink and its firmness of bonding with the palm leaf matrix. The specific operation is as follows: Heat deionized water to 40-60℃ and pour it into a shallow dish. The amount of water should be enough to completely immerse the palm leaf. To assist the deacidification process, an appropriate amount of cellulose ethers such as methyl cellulose or carboxymethyl cellulose can be added to the water. Place the palm leaf on a bamboo curtain and gently put it into the water as a whole to ensure that it is completely immersed, and cover the palm leaf with a bamboo curtain to prevent it from floating in the water. The soaking time is 15-30 minutes, which is adjusted according to the severity of the stains and the tolerance of the palm leaf. The soaking effect is judged by observing the color change of the water. If the water becomes dirty, it should be replaced with clean hot water to continue soaking and cleaning until the color of the water no longer changes significantly. During the soaking process, the state of the palm leaf should be checked regularly to ensure that the deacidification effect is appropriate and not excessive. The hot water deacidification method has low technical requirements, simple operation steps, and is easy to master and apply in actual restoration work. Adding alkaline cellulose ethers such as methyl cellulose and carboxymethyl cellulose to hot water can play a certain role in deacidification, help neutralize the acidic substances in the paper, and extend the shelf life of the palm leaf scriptures. Compared with chemical deacidification methods, hot water deacidification has less impact on the chemical properties of the palm leaf material, is more gentle, and helps to maintain the original characteristics of the palm leaf scriptures.

[0137] Step 6: Classify the damage of the palm leaves, which can be divided into the following 5 categories:

[0138] (1) Size: 4mm 2 Small wormholes within range;

[0139] (2) Size: 4mm 2 Up to 25mm 2 Large wormholes within range;

[0140] (3) Crack location;

[0141] (4) defect location;

[0142] (5) Edge drawing area

[0143] Step 7, Bayeux patching and reinforcement, including:

[0144] (I) Repair small wormholes:

[0145] (1) Prepare bay leaf slurry: a. Prepare binder A (25wt% animal protein glue solution): weigh gelatin and hide glue (mass ratio of 1:1) according to the required amount, soak in cold water for 20 minutes to allow it to fully absorb water and swell, then inject 70°C hot water and stir continuously until it is fully dissolved. b. Prepare bay leaf powder: Crush the bay leaves that have been accelerated by dry heat aging at 130°C for 72 hours, and sieve them through a 60-mesh or above sieve to make bay leaf powder. The finer the sieve, the better the effect. c. Prepare bay leaf slurry: Mix the binder A prepared above with bay leaf powder in a ratio of 1:3 to make bay leaf slurry. The bay leaf slurry used in step 7 is prepared in this way.

[0146] (2) Apply the slurry: Use a small scraper to evenly apply the slurry to the area to be repaired. Make sure that the slurry is sufficient to cover the damaged area, but do not apply too much to avoid uneven thickness. To prevent sticking, place a piece of plastic film on the table.

[0147] (3) Remove excess slurry: Before the slurry solidifies, use a small scraper to gently remove excess slurry. Pay attention to adjusting the thickness and shape to ensure that the repaired area matches the surrounding area or is slightly lower than the surrounding area to facilitate the later filling of slurry powder.

[0148] (4) Absorbing and pressing: Place a clean absorbent paper over the repair area, making sure that the absorbent paper completely covers the repair area. Gently press the absorbent paper to absorb excess water. Use your palm to apply even force when pressing to ensure that the moisture in the entire repair area is fully absorbed by the absorbent paper. To prevent sticking, sprinkle a layer of palm leaf powder sieved through a 60-mesh or higher sieve on the repair area. The finer the mesh, the better the effect.

[0149] (5) Shaping: Use your fingernail or shaping tool to gently rub the surface of the repaired area back and forth to create a natural joint and smooth surface. After removing the absorbent paper, if you find that the surface of the repaired area is still uneven, you can make detailed adjustments (such as applying palm leaf pulp) and shaping again to ensure that the surface is smooth and blends naturally with the original.

[0150] (6) Pressing and fixing: Cover the repaired area with a clean plastic film and a clean pressing board. Then place a heavy object on top of the pressing board to ensure that the repaired area is evenly pressed to further shape and keep it flat. The weight of the pressing stone used in the repair depends on the specific needs of the repaired object. It is generally between 1 kg and 5 kg. For thinner or fragile palm leaves, lighter pressing stones are usually used to avoid damage caused by excessive pressure; for thicker palm leaves or those that require stronger fixing effects, heavier pressing stones may be used. The specific weight should be determined according to the material of the palm leaf, the degree of damage, and the repair method.

[0151] (7) Drying and curing: Keep the repaired area under heavy pressure for a period of time, usually 3 to 24 hours, to ensure that the bonded part is completely dry and cured. During this process, the absorbent paper can be replaced to avoid adhesion.

[0152] (8) Check and adjust: Remove the heavy objects and absorbent paper and check the repair effect. If any unevenness or uneven thickness is found, you can make subtle adjustments again, such as applying glue, filling with palm leaf powder and shaping, to ensure the perfect repair effect.

[0153] (II) Repairing the big wormhole:

[0154] (1) Apply adhesive A: Take an appropriate amount of adhesive A and apply it evenly on the damaged edge. Make sure that the adhesive is evenly applied to the damaged area so that the adhesive can effectively bond and fix the palm leaf material in the subsequent repair steps. Excess adhesive A can be wiped off with a wet sponge.

[0155] (2) Filling with palm leaf fiber strips: Use fine-pointed tweezers to fill the wormhole with palm leaf fiber strips ranging from 2 mm to 5 mm in length. The palm leaf fiber strips are obtained by breaking the aged palm leaves and screening them with a 40-mesh sieve. Ensure that the fiber strips are evenly distributed and tightly fill the wormhole to provide a stable repair foundation.

[0156] (3) Apply glue again: Take an appropriate amount of adhesive A and apply it evenly on the palm fiber strips.

[0157] (4) Filling with palm leaf powder: Use wide-head tweezers to fill the fiber strips with palm leaf powder. The palm leaf powder is obtained by crushing the palm leaves that have undergone preliminary aging treatment and sifting through a 60-mesh or higher sieve. The finer the sieve, the better the effect. Ensure that the palm leaf powder is evenly distributed and fully combined with the glue to enhance the structural stability of the repair area.

[0158] (5) Shaping: Use your fingernail or shaping tool (such as a stainless steel spoon) to gently rub back and forth on the surface of the repair area to create a natural seam and smooth surface. To prevent adhesion, place a plastic film over the repair area.

[0159] (6) Further adjustment of shaping: After removing the plastic film, if it is found that the surface of the repaired area is still uneven, detailed adjustments (such as applying glue, filling with palm leaf powder) and shaping can be performed again to ensure that the surface is smooth and naturally blends with the original.

[0160] (7) Pressing and fixing: the method is the same as above (the same as the method of repairing small wormholes). (8) Drying and curing: the method is the same as above (the same as the method of repairing small wormholes). (9) Inspection and adjustment: the method is the same as above (the same as the method of repairing small wormholes).

[0161] (III) Repair cracks:

[0162] (1) Apply adhesive A: Take an appropriate amount of adhesive A and apply it evenly on the edge of the crack.

[0163] (2) Filling with palm leaf powder: Use wide-head tweezers to fill the palm leaf powder on the front and back of the glue. The palm leaf powder is obtained by breaking the palm leaves that have undergone preliminary aging treatment and screening them through a 60-mesh or above sieve. The finer the sieve, the better the effect. Ensure that the palm leaf powder is evenly distributed and fully combined with the glue to enhance the structural stability of the repair area.

[0164] (3) Perform shaping: Same method as above. (4) Further adjustment of shaping: Same method as above. (5) Pressing and fixing: Same method as above. (6) Drying and curing: Same method as above. (7) Inspection and adjustment: Same method as above.

[0165] Comparison of the wormhole and crack parts before and after repair is shown in Figure 2 .

[0166] (IV) Repair of defective parts:

[0167] (1) Repair the palm leaf patch and the gap: Use a sponge with a thickness of not less than 5 mm, and place the palm leaf to be repaired and the palm leaf patch on the sponge in the following order: palm leaf to be repaired, palm leaf patch, and sponge. Then, use a needle awl to pierce the damaged shape to make a shape that fits the defect, and use a scalpel to remove the stubble on the edge of the defect and the edge of the palm leaf patch.

[0168] (2) Apply adhesive A: Take an appropriate amount of adhesive A and apply it evenly on the defective edge of the palm leaf.

[0169] (3) Splicing the palm leaf patch: Carefully align the palm leaf patch and stick it to the defective part of the palm leaf to be patched, ensuring that the joints are tightly combined.

[0170] (4) Apply adhesive A again as needed: Same method as above. (5) Fill with palm leaf powder: Same method as above (same as the operation for repairing cracks). (6) Perform shaping: Same method as above. (7) Further adjustment of shaping: Same method as above. (8) Press and fix: Same method as above. (9) Dry and cure: Same method as above. (10) Check and adjust: Same method as above.

[0171] Comparison of the defect of the Bayeux before and after repair is shown in Figure 3 .

[0172] (V) Repair the edge brushing area:

[0173] (1) Trimming the palm leaf patch: the method is the same as above.

[0174] (2) Combing and drawing: Use pointed tweezers to straighten the Baye wire. If the Baye wire is warped, moisten it with water and then dry it to ensure that the Baye wire is flat and smooth.

[0175] (3) Filling the bay leaf patch: Place the bay leaf patch accurately between the upper and lower layers of the wire drawing to ensure that it completely covers the defect and fits tightly.

[0176] (4) Apply adhesive A: Take an appropriate amount of adhesive A and apply it evenly on the drawing area. Make sure the adhesive is evenly distributed. Excess adhesive can be wiped off with a wet sponge.

[0177] (5) Perform shaping: Same method as above. (6) Further adjustment of shaping: Same method as above. (7) Pressing and fixing: Same method as above. (8) Drying and curing: Same method as above. (9) Inspection and adjustment: Same method as above.

[0178] Comparison of the edge drawing of the palm leaf before and after restoration is shown in Figure 4 .

[0179] In step 7, the steps involved in shaping, further adjustment of shaping, pressing and fixing, drying and curing, inspection and adjustment are the same as the corresponding operation methods in repairing small wormholes and repairing large wormholes.

[0180] Step 8, leveling the palm leaf scripture: prepare two book pressing boards, place the palm leaf scripture on absorbent paper, spray a small amount of water on the surface of the absorbent paper, and use the diffusion effect of water vapor to help the palm leaf scripture level. Then, place the palm leaf scripture between the book pressing boards, and evenly place appropriate weights on top, applying continuous and even pressure to ensure that it is completely flat. Wait for the palm leaf scripture to be completely dry, then remove the weights and absorbent paper. Using absorbent paper and appropriate amounts of water can effectively prevent excessive moisture or damage while keeping the surface of the palm leaf scripture moist.

[0181] Step 9, binding of the palm leaf sutra: Use acid-free polyester film of appropriate size for display and storage of the palm leaf sutra to provide protection and prevent the erosion of the palm leaf sutra by environmental humidity and acidic substances. The use of acid-free materials can not only effectively extend the shelf life of the palm leaf sutra, but also ensure that it is not damaged during display. In addition, the traditional plywood binding method can be used to ensure that the palm leaf sutra remains flat and stable during storage and display.

[0182] The above-mentioned method for repairing the palm leaf scriptures can select several or all of the steps for repair according to the specific damage of the palm leaf scriptures. The method has the advantages of being systematic, scientific, easy to operate and having a significant repair effect. Through this method, the palm leaf scriptures can be restored to their original appearance, making it easier to continue reading and preserve them for a long time. This method can not only effectively solve common damage problems, but also provide a reliable repair method while ensuring the originality and integrity of the cultural relics, ensuring the long-term preservation and use value of the palm leaf scriptures.

[0183] Example 3 Comparison of treatment effects of palm leaf patches prepared by different methods

[0184] This example compares the effects of treating palm leaves with the black tea dyeing method and the present invention's dyeing and artificial accelerated aging treatment. Newly processed palm leaves were taken and treated according to the treatment methods of groups b to d. The results are shown in Figure 5 -A.

[0185] Group a: newly processed bay leaves, without any treatment;

[0186] Group B: Freshly processed palm leaves treated with black tea dyeing method: 40g black tea + 1500mL water + a little ink, boiled on low heat for 2 hours;

[0187] Group C: Dyeing materials and methods are as follows: Use mineral dye ochre, plant dye gamboge and ink (Jiang Sixu Tang mineral pigment ochre, Jiang Sixu Tang plant pigment gamboge and Xuancheng Shihaiming pine smoke ink, respectively), dye the newly processed palm leaves by multiple shading, and finally brush on alum water to fix the color, wherein the mass ratio of gelatin to alum in the alum water is 3:1. Figure 5 -B.

[0188] Group d: Bay leaves that still retain a certain strength and toughness after being dry-heat treated at 120°C for 10 days.

[0189] The results show that the results of the dyeing and aging treatments and artificial accelerated aging treatments of the present invention are closer to the color of the palm-leaf scriptures to be repaired, among which the dyeing and aging treatment has the best effect.

[0190] Example 4 Comparison of the repair effects of different repair materials on defect sites

[0191] This example compares the repair effects of three repair materials: paper pulp, undyed palm leaves, and the old-dyed palm leaves of the present invention on the palm leaf sutra. The repair operation is performed according to the defect repair method of Example 2 of the present invention. Figure 6 , the repair results are shown in Figure 7 .

[0192] Example 5 Comparison of the effects of the palm leaf slurry dripping method and the repair method of the present invention

[0193] The method of dripping the palm leaf slurry is to mix the palm leaf powder with methylcellulose to make a solution, and then drip the slurry with a manual straw. The repair effect can be seen Figure 8 .

[0194] The results show that the palm leaf slurry dripping method has problems such as insufficient bonding strength, inability to reproduce the palm leaf texture, and obvious color difference. The present invention uses improved palm leaf slurry (made of animal protein glue solution and palm leaf powder) to repair small wormholes, and uses the present invention's dyed and aged palm leaf patch to repair large-area defects, which not only enhances the bonding strength, but also has a color difference similar to that of the palm leaf sutra to be repaired, thereby effectively improving the above problems.

[0195] Example 6 Comparison of the repair effects of the prior art and the repair method of the present invention

[0196] Prior art repair methods include Japanese paper gap filling (prior art 1), Japanese paper reinforcement (prior art 2) and pulp repair (prior art 3).

[0197] Prior art 1—Japanese paper filling method: Use dyed Japanese paper and wheat starch to repair the defective part of the palm leaf meridian, and stack Japanese paper layer by layer to achieve the required thickness.

[0198] Prior art 2—Japanese paper reinforcement method: Use Japanese paper and adhesive (EVA and MC mixture) to cover and repair the damaged palm leaf sutra.

[0199] Prior art 3 - pulp repair method: the parchment paper and water are stirred in a wall breaking machine to form a pulp water solution, and then a pulp machine is used for repair.

[0200] The palm leaf scriptures were repaired according to the methods of the above-mentioned prior arts 1 to 3 and the method of Example 2 of the present application, and the results are shown in FIG. Figures 9-11 .

[0201] The results show that the repair method of the present invention has obvious advantages over the prior arts 1 to 3. The thickness and color of the palm leaf sutra repair material used in the repair method of the present invention are closer to the palm leaf sutra after curing, the repair effect is better, and it is reversible.

[0202] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. Materials used to repair the palm leaf sutras, It is characterized in that It includes material 1 for repairing a small wormhole and material 2 for repairing a large wormhole; The material 1 is a palm leaf pulp made of a binder A and palm leaf powder; The material 2 includes a binder A, palm leaf powder and palm leaf fiber strips; The binder A is an animal protein glue solution; the animal protein glue includes at least one of gelatin, fish glue, hide glue and bone glue; In the palm leaf slurry, the mass ratio of binder A to palm leaf powder is 1:(2-10).

2. The material according to claim 1, It is characterized in that Also included are materials for repairing cracks 3; The material 3 includes the binder A and palm leaf powder.

3. The material according to claim 1 or 2, It is characterized in that Also included is a material 4 for repairing the defect; the material 4 includes a palm leaf patch, the adhesive A and palm leaf powder; The palm leaf patch is a palm leaf that is obtained through artificial accelerated aging or dyeing and has a color and thickness close to the defective part.

4. The material according to any one of claims 1 to 3, It is characterized in that It also includes a material 5 for repairing the edge wire drawing area; the material 5 includes a bay leaf patch and the adhesive A.

5. The material according to any one of claims 1 to 4, It is characterized in that The palm fiber strips are palm fibers with a length of 2 mm to 5 mm; The binder A is an animal protein glue solution with a mass fraction of 20% to 30%; The palm leaf powder is the palm leaf powder that has passed through a 60-200 mesh sieve.

6. Use of the material according to any one of claims 1 to 5 in repairing palm leaf scriptures; The repair include: At least one of repairing small wormholes, repairing large wormholes, repairing cracks, repairing defective parts and repairing edge brushed parts.

7. Methods for repairing the palm leaf scriptures. It is characterized in that The palm leaf scriptures are repaired using the material described in any one of claims 1 to 5.

8. The method according to claim 7, It is characterized in that The steps include: (1) Classification of damaged palm leaf sutras: The damaged parts of the palm leaf sutras are divided into the following categories: Size < 4 mm 2 Small wormholes, sized between 4 and 25 mm 2 The large wormholes, cracks, defects and edge wire drawing areas between them; (2) Repairing small wormholes with material 1: Fill the small wormholes with bay leaf pulp, absorb water and press, and then shape and post-process; (3) Repairing the large wormhole with material 2: After applying adhesive A on the edge of the wormhole, fill the wormhole with palm leaf fiber strips; then apply adhesive A on both sides of the fiber strips and fill with palm leaf powder; finally, perform shaping and post-processing; (4) Repair the cracked area with material 3: Apply adhesive A to the edge of the crack and evenly fill it with palm leaf powder, and then perform shaping and post-processing in turn; (5) Repairing the defect with material 4: 1) Take the artificially aged or dyed palm leaf and make a palm leaf patch with the same shape and size as the defect; 2) Apply adhesive A to the edge of the palm leaf patch, align the grain and stick it to the defect of the palm leaf to be repaired, and evenly fill the front and back of the bonding place with palm leaf powder; 3) Shaping and post-processing; (6) Use material 5 to repair the edge brushed area: Take the palm leaves that have been artificially accelerated aged or dyed to make a palm leaf patch with the same shape and size as the defective area; after combing and brushing, place the palm leaf patch between the upper and lower layers of the brushed wire to cover the defective area and fit it tightly, and evenly apply adhesive A on the brushed area; finally, perform shaping and post-processing.

9. The method according to claim 8, It is characterized in that In steps (5) to (6), the artificial accelerated aging or dyeing of the old palm leaves is carried out at 100 to 150° C. or 60 to 80° C. and 50 to 70% RH for 3 to 240 hours; The dyeing and aging process comprises: dyeing the palm leaf with mineral dye ochre, plant dye gamboge and ink in sequence, and finally brushing with alum water to fix the color; The gelatin alum water is made of deionized water, gelatin and alum; the mass ratio of the gelatin to the alum is 1:1 to 3:

1.

10. The method according to claim 8, It is characterized in that In steps (2) to (6), the shaping is as follows: a plastic film is placed above the repair area, and a fingernail or a shaping tool is used to gently rub back and forth on the surface of the repair area to shape a natural seam and a smooth surface; The post-treatment includes: pressing, fixing, drying and curing steps; the pressing, fixing, drying and curing steps include: applying a uniform pressure of 1 kg to 5 kg and maintaining it for 3 to 24 hours.

11. The method according to any one of claims 7 to 10, It is characterized in that Before repairing the palm leaf sutra, the steps of disinfection and insecticide treatment, removal of sticky palm leaves, cleaning and decontamination, color reinforcement and deacidification are also included.

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