Repairing material of paper mural, application and repairing method of paper mural

Abstract

The invention discloses a repairing material of a paper mural, application and a repairing method of the paper mural, and relates to the technical field of cultural relic repairing. Comprising a reinforcing agent and a penetrating softener, and the concentration of the reinforcing agent is 3-6 wt.%. The reinforcing agent comprises an acrylic emulsion, and the osmotic softener comprises 1-4% of ethanol. The acrylic emulsion is adopted as the reinforcing agent and is matched with the low-concentration ethanol for permeation softening, so that softening and reinforcing of the paper mural can be realized at the same time, the repairing procedures are reduced, the repairing difficulty is reduced, and secondary damage cannot be caused in the repairing process of the paper mural. Furthermore, the acrylic emulsion is selected as the repairing material of the paper wall painting, and the concentration of the reinforcing agent is controlled, so that the whole repairing material is colorless and transparent after being dried, the repaired surface is free of dazzle light, and a good repairing effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cultural relics restoration, and in particular to a restoration material and application of a paper mural, and a restoration method of a paper mural. Background Art

[0002] Murals are a form of cultural relics, mostly painted on walls, stone walls and other carriers. Usually, a base layer is first made on the wall, stone wall and other carriers, and then the mural layer is painted on the surface of the base layer according to different techniques. For example, most temple murals are painted on the surface of the mud base layer with a layer of white lime base layer, and then natural mineral pigments are mixed with cementing materials on the white lime layer to paint the murals. As a form of cultural relics, the paper murals of the Qing Dynasty are made of unique materials and processes, which are very rare in the world. The stratigraphic relationship of paper murals can be roughly divided into three layers: ancient building carrier, ground layer and paper mural layer. The ancient building carrier is the blue brick wall at the bottom of the paper mural; the ground layer is mainly composed of the traditional single-batch gray ground layer of ancient buildings. Since the single-batch gray ground layer is a mixture of oil, brick ash and other materials, it does not contain linen, linen silk and other reinforcement materials. Therefore, the relationship between the ground layers is relatively obvious, and from the bottom to the top, they are composed of seam ash, free-flowing ash and fine ash respectively; the paper mural layers are two layers of linen paper, a white powder layer and a pigment layer from the bottom to the top.

[0003] Due to the material characteristics of the ground layer of paper murals (single batch of gray ground layer), paper murals are prone to large-scale cracking, warping, deformation and falling off in the cold and dry northern regions. When the ground layer shows the above-mentioned defects, the paper layer on its surface will also deform with the deformation of the ground layer. Moreover, due to the large material difference between the paper layer and the ground layer, the deformation of the ground layer may even cause secondary deformation of the paper layer on the basis of the deformation of the ground layer, causing lasting impact on the on-site preservation of cultural relics.

[0004] The existing repair method of the putty ground layer of ancient buildings is mainly to repair the cracked and warped putty ground layer, specifically, the warped and deformed ground layer is softened by hot steam fumigation, and then the softened area is reinforced by reinforcing materials. Since there is no filling and connection of reinforcing materials such as hemp silk or linen in the ground layer of paper murals, and there is also a paper layer on the surface of the ground layer, the method of steam fumigation easily leads to secondary damage and falling off of the paper murals, which is not suitable for the repair of this type of cultural relics. Therefore, it is urgent to provide a repair material and a repair process suitable for putty ground paper murals to solve the problems of cracking, warping, deformation and falling off of paper murals. In addition, the existing repair method of the cracked and warped ancient building putty ground layer mostly uses oil as a bonding material to bond the material of the ground layer to the surface of the ancient building carrier, but oil is an oily bonding material. Once it is impregnated into the surface of paper or pigment, it is extremely difficult to clean it up, which will cause irreversible damage to the paper murals.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a paper mural repair material and application, and a paper mural repair method.

[0007] The present invention is achieved in that:

[0008] In a first aspect, the present invention provides a paper mural repair material, comprising a reinforcing agent and an osmotic softener, wherein the concentration of the reinforcing agent is 3 to 6 wt.%.

[0009] The reinforcing agent includes acrylic emulsion, and the osmotic softener includes 1-4% ethanol.

[0010] In an optional embodiment, the reinforcing agent is acrylic emulsion, the concentration of the reinforcing agent is 3 wt.%, and the osmotic softener is 2% ethanol.

[0011] In a second aspect, the present invention provides a method for repairing paper murals, comprising covering the area to be repaired with a wet compress carrier material loaded with a repair material as described in the aforementioned embodiment, performing infiltration softening and reinforcement on the area to be repaired, and then using a re-sticking tool to re-stick and reinforce the area to be repaired.

[0012] In an optional embodiment, the time of osmotic softening is ≥90 s.

[0013] Preferably, the osmotic softening time is 90 to 180 seconds.

[0014] In an alternative embodiment, the repair material is wetted onto the wet compress carrier material without dripping.

[0015] The wet compress carrier material includes any one of absorbent cotton, non-woven fabric or washed fiber.

[0016] In an optional embodiment, the osmotic softening process further includes covering the surface of the wet compress carrier material with an isolating material, wherein the isolating material includes at least one of a PVC film, a PE film, a PVDC film, a PP film or a silicon film.

[0017] In an optional embodiment, the re-sticking reinforcement includes applying pressure to the area to be repaired using a re-sticking tool, and the number of re-sticking is at least one.

[0018] In an optional embodiment, the number of re-sticking is three times. The first re-sticking includes covering the surface of the area to be repaired with a non-sticky material, and then applying pressure to the area to be repaired with a wooden pressure knife; the second re-sticking includes using a re-sticking reinforcement bag to apply back pressure to the area to be repaired; the third re-sticking includes using a supporting device to support and press the area to be repaired.

[0019] Preferably, the non-adhesive material includes any one of glossy fiber paper or lens paper.

[0020] In an optional embodiment, before the third re-sticking, the repair material that may have seeped out around the area to be repaired is cleaned.

[0021] In a third aspect, the present invention provides an application of the repair material according to the aforementioned embodiment in mural restoration.

[0022] The present invention has the following beneficial effects:

[0023] The present invention provides a paper mural repair material and application, and a paper mural repair method. By using acrylic emulsion as a reinforcing agent and coordinating with low-concentration ethanol for penetration softening and reinforcement, the paper mural can be softened and reinforced at the same time, reducing the repair process and the difficulty of repair, and at the same time, no secondary damage will be caused in the process of repairing the paper mural. Furthermore, by selecting acrylic emulsion as the paper mural repair material and controlling the concentration of the reinforcing agent, the repair material is colorless and transparent as a whole after drying, and there is no glare on the surface after repair, and has a good repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A step diagram of a method for repairing a paper mural provided in Example 2 of the present invention;

[0026] Figure 2 A comparison of the paper murals of the Qing Dynasty in the stupa of Yongyou Temple in Chengde Mountain Resort before and after being repaired by the paper mural repair method provided in Example 2 of the present invention;

[0027] Figure 3 A comparison of the paper murals of the Yongyou Temple in Chengde Mountain Resort before and after being repaired by the paper mural repair method provided in Example 2 of the present invention;

[0028] Figure 4 A comparison of the paper murals of the Qing Dynasty in the stupa of Yongyou Temple in Chengde Mountain Resort before and after being repaired by the paper mural repair method provided in Example 2 of the present invention;

[0029] Figure 5 for Figure 4 The ultrasonic detection cloud maps of the paper mural before and after restoration are shown. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] Paper murals are an artistic expression form in the Qing Dynasty. They are now mostly found in Beijing, Hebei and other regions. They are a royal art expression form. They are relatively rare and therefore have high artistic value. They have far-reaching significance for people to study and understand the history, culture, science and technology, and art levels of the time.

[0033] According to different layer relationships, paper murals include three layers: ancient building carrier, ground layer and paper mural layer; the ancient building carrier is the blue brick wall at the bottom of the paper mural; the ground layer is mainly composed of a single batch of gray putty ground layer; the paper mural layer includes a paper layer connected to the ground layer, and a white powder layer and a pigment layer on the surface of the paper layer. Because the single batch of gray ground layer is different from the common adobe and mud ground layer, its raw materials do not contain reinforcement materials such as linen or hemp silk. Therefore, once deformation occurs, such as cracking, warping or even falling off, there is no support from the reinforcement materials, and the possibility of falling off is greater, and the disease will be more serious than the common earth-gray ground layer or the ground layer containing sesame oil putty.

[0034] At the same time, deformation and disease of paper murals almost coexist in the three layers of the base layer, paper layer and pigment layer. Where there are cracks in the base layer, they are basically accompanied by local warping and shedding, and the occurrence of base layer diseases is often closely related to paper layer diseases. For example, cracks, warping and deformation of the base layer directly lead to cracks, warping and shedding of the paper layer, which in turn leads to cracks and shedding of the pigment layer.

[0035] The existing method for repairing cracked and warped ancient building putty ground is mainly to soften it through hot steam fumigation, then apply oil to the bottom of the ground layer, and then stick it back to reinforce it. Since the ground layer material of the paper mural is a single batch of gray ground, without any hemp silk or linen cloth, and without the support of ribs and aggregates, the warped joints of the mural are relatively fragile, and steam fumigation can easily cause the paper mural to fall off. Oil is an oily material and is mostly colored, which can easily cause contamination of the paper mural during the bonding process, which may cause secondary damage to the paper mural during the repair process. Therefore, the inventor proposes the following solution.

[0036] In a first aspect, the present invention provides a paper mural repair material, comprising a reinforcing agent and an osmotic softener, wherein the concentration of the reinforcing agent is 3 to 6 wt.%.

[0037] The reinforcing agent includes acrylic emulsion, and the osmotic softener includes 1-4% ethanol.

[0038] By using acrylic emulsion as a reinforcing agent, acrylic emulsion is a milky white water-soluble material, and with low concentration of ethanol, the concentration of the reinforcing agent in the obtained repair material is 3-6wt.%, so that the repair material is water-soluble as a whole, colorless and transparent, and there is no glare on the surface after repair, which has a good repair effect. At the same time, the formula of ethanol and acrylic emulsion can soften and reinforce the paper mural at the same time, reducing the repair process and the difficulty of repair, and will not cause secondary damage during the repair process of the paper mural.

[0039] In addition, the reinforcing agent made of acrylic emulsion has good aging resistance, compatibility and adhesion. The repaired area can remain stable for a long time, which is conducive to the long-term protection of cultural relics.

[0040] The single batch of gray ground layer of paper murals is a harder oily ground layer. By adding 1-4% ethanol solution to modify the acrylic emulsion, it is beneficial to open up the capillaries between the layers of the paper murals, enhance the softening and penetration effect of the repair material on the ground layer material, shorten the softening time, and improve the repair efficiency.

[0041] In some embodiments, the concentration of the reinforcing agent may be, for example, any one of 3 wt.%, 3.5 wt.%, 4 wt.%, 4.5 wt.%, 5 wt.%, 5.5 wt.% or 6 wt.%, or a range between any two values.

[0042] In some embodiments, the concentration of ethanol may be, for example, any value of 1%, 2%, 3% or 4%, or a range between any two values.

[0043] Preferably, the ethanol of the above concentration can be prepared by diluting anhydrous ethanol with deionized water.

[0044] In a second aspect, the present invention provides a method for repairing paper murals, comprising covering a wet compress carrier material loaded with a repair material as described in the aforementioned embodiment on an area to be repaired, infiltrating and softening the area to be repaired, and then re-pasting the area to be repaired using a re-pasting tool.

[0045] By using wet-compression bearing materials to load the repair material, the area to be repaired can be infiltrated for a long time, and the repair material can fully penetrate into the material of the area to be repaired to soften it. At the same time, the reinforcing agent also fully penetrates into the material of the area to be repaired during the softening process. Therefore, after penetration and softening, the area to be repaired can be directly re-pasted using a re-pasting tool. The reinforcing agent in the repair material allows the material of the area to be repaired to be stably combined with the ground layer and / or the ancient building carrier at the bottom.

[0046] At the same time, since the reinforcing agent penetrates inward from the surface of the area to be repaired, when the area to be repaired has multiple layers and defects at the same time, for example, cracking, warping and deformation begin to appear in the base layer of the area to be repaired, resulting in defects in the paper layer and the pigment layer on the surface of the base layer, then in the process of penetration and softening, the reinforcing agent can increase the tightness of the connection between each layer, realize the rapid repair of multiple layer defects, ensure the tight connection between the layers, and improve the durability of the connection between the layers.

[0047] In an optional embodiment, the time of osmotic softening is ≥90 s.

[0048] Preferably, the osmotic softening time is 90 to 180 seconds.

[0049] By controlling the penetration softening time within the above range, it is possible to ensure that the softening degree of the area to be repaired is appropriate to avoid cracking during the back pressure process caused by incomplete softening, and to avoid excessive softening that leads to a decrease in the bonding ability between the area to be repaired and the material at its bottom.

[0050] In an optional embodiment, in order to prevent the repair material from affecting the surrounding areas of the paper mural that are not damaged, the repair material is soaked on the wet compress carrier material without dripping.

[0051] The wet compress bearing material includes any one of absorbent cotton, non-woven fabric or washed water fiber. The wet compress bearing material can be selected as long as it can be used to bear the repair material and does not damage the paper mural body.

[0052] In an optional embodiment, in order to prevent the repair material from drying up quickly in the air and affecting the penetration softening effect, the penetration softening process also includes covering the surface of the wet compress carrier material with an isolation material, and the isolation material includes at least one of PVC film, PE film, PVDC film, PP film or silicone film.

[0053] Preferably, in order to facilitate obtaining the isolation material, the isolation material can be a cling film made of the above raw materials, such as PE cling film, PVC cling film or silicone cling film, etc. In other embodiments, the isolation material can also be a film material for other purposes, but contains the raw materials of at least one of the above films.

[0054] In an optional embodiment, the re-sticking reinforcement includes applying pressure to the area to be repaired using a re-sticking tool, and the number of re-sticking is at least one.

[0055] Since the area where the paper mural is located is not completely flat, some positions may be uneven. In order to ensure the re-pasting effect of the area to be repaired, in an optional implementation manner, the number of re-pasting is three times.

[0056] The first re-sticking includes covering the surface of the area to be repaired with a non-sticky material and then applying pressure to the area to be repaired with a wooden pressure knife.

[0057] The non-sticky material includes any one of glossy fiber paper and lens paper. The non-sticky material can effectively isolate the wood press knife and the area to be repaired, and prevent the repair material on the surface of the area to be repaired from contacting the wood press knife and adhering to the surface of the wood press knife, thereby damaging the paper mural.

[0058] At the same time, the non-sticky material can also take away the excess repair material on the surface of the area to be repaired. Therefore, when using a wooden press knife to press, the non-sticky material needs to be replaced in time to avoid the gradual accumulation of repair material on the surface of the non-sticky material, which will cause the non-sticky material to adhere to the material in the area to be repaired and cause damage to the paper mural.

[0059] By using non-sticky materials and a wooden press knife for the first re-sticking, the softened and reinforcing agent-rich material in the area to be repaired can be stuck inward to the material at the bottom. At the same time, the wooden press knife can perform targeted pressure re-sticking on different areas to ensure that the initial re-sticking of the material in the area to be repaired is uniform, and there will be no situation where the material in the area to be repaired cannot be fitted due to unevenness in some areas.

[0060] The second re-sticking includes using a re-sticking reinforcement bag to press back the area to be repaired; through the first re-sticking, the material of the area to be repaired is almost completely in contact with the material at the bottom, and then the re-sticking reinforcement bag can be used to press the material of the area to be repaired inward and tightly, ensuring the initial fixed connection between the area to be repaired and its bottom.

[0061] The third re-pasting includes using a supporting device to support and pressurize the area to be repaired; the supporting device presses and fixes the area to be repaired after the second re-pasting until the material in the area to be repaired is completely dried and solidified to ensure the repair effect and avoid deformation of the material in the area to be repaired during the drying and solidification process.

[0062] In an optional embodiment, before the third re-sticking, the repair material seeping out around the area to be repaired is cleaned to remove excess repair material around it.

[0063] Preferably, cotton swabs, cotton sticks, etc. can be used for cleaning, and the cleaning process should be gentle to avoid damaging the paper mural during the cleaning process.

[0064] In an optional embodiment, in order to ensure the overall repair effect, before the paper mural is softened and re-pasted for reinforcement, impurities in the area to be repaired of the paper mural are cleaned to prevent impurities on its surface or surroundings from affecting the repair process.

[0065] Preferably, the impurities can be cleaned by using ear cleaning balls, soft brushes, cleaning rods and other materials to clean the area to be repaired. For example, ear cleaning balls can be used to remove dust, but the blowing force of the ear cleaning balls should not be too large to avoid damage to the paper murals. Therefore, dust that cannot be removed by ear cleaning balls can be removed by gently sweeping with soft brushes.

[0066] In a third aspect, the present invention provides an application of the repair material according to the aforementioned embodiment in mural restoration.

[0067] Example 1

[0068] This embodiment provides a paper mural repair material, including a reinforcing agent and an osmotic softener.

[0069] The reinforcing agent is acrylic emulsion, and the penetrating softener is 2% ethanol. The acrylic emulsion is diluted with 2% ethanol to make the concentration of the acrylic emulsion 3wt.%, thereby obtaining a repair material for paper murals.

[0070] Example 2

[0071] Please refer to Figure 1 This embodiment provides a method for repairing a paper mural, comprising the following steps:

[0072] S01. Impurity cleaning

[0073] Use ear cleaning bulbs and soft brushes to remove dust and debris from the bottom of cracked and warped paper murals, and use a cleaning rod to clean the particles between the layers of the paper murals. This step should be done with extreme caution. The pressure when pressing the ear cleaning bulb should not be too great, and the air flow should be kept blowing out slowly and evenly from the inside; when using a brush, a soft brush should be used, and the brush should not be pressed onto the surface of the paper mural as a whole. Use a quarter of the brush head and clean slowly and evenly at a 45° angle without excessive friction.

[0074] S02, penetration softening reinforcement

[0075] Cut the cotton wool into equal sizes and thicknesses, and gently apply them to the cracked or warped areas of the paper mural. Use a special dripper for reinforcement materials to drip the repair material provided in Example 1 onto the cotton wool. The cotton wool should be completely soaked in the repair material after dripping, but there should be no dripping of the repair material.

[0076] After the repair material is completely soaked, cover the surface of the absorbent cotton with plastic wrap to tightly wrap the softened and reinforced area. The softened repair material will evaporate quickly due to exposure to the air, affecting the penetration, softening and reinforcement effects. After covering with plastic wrap for 90 seconds, uncover the plastic wrap and absorbent cotton.

[0077] S03, Reply

[0078] The re-sticking process includes three times. The first time, use glossy fiber paper. Gently stick the smooth side of the paper on the surface of the softened and reinforced area. Use a wooden pressing knife to gently press on the surface of the paper. Press back evenly from the upper left to the lower right. The pressure should not be too large. Excessive force will cause indentations on the surface, affecting the repair effect. The fiber paper should be changed frequently during re-pressing, and the same paper should not be used repeatedly for pressing.

[0079] After the first re-pasting is completed, use a re-pasting reinforcement package to continue the second re-pasting of the softened reinforcement area. The re-pasting pressure of the re-pasting reinforcement package can make the various layers of the paper mural more tightly bonded.

[0080] After the second re-sticking, in order to prevent the residual repair material in the softened and reinforced area or the adverse effects such as glare on the surface, use a cotton swab to clean the seepage areas around the softened and reinforced area of ​​the paper mural. Do not use excessive force during the cleaning process to avoid increasing the physical friction between the cotton swab and the paper mural.

[0081] After cleaning, the third re-pasting is carried out. The third re-pasting uses a special support plate and a top support frame to correct the top support positioning of the softened reinforcement area until the repair material is completely dried, solidified and shaped, and then the special support plate and top support frame are removed, and the repair is completed.

[0082] The restoration method of this embodiment is applied to the restoration of the Qing Dynasty paper murals in the stupa of Yongyou Temple in Chengde Mountain Resort. Figure 2 to Figure 4 The results shown by Figure 2 to Figure 4 It can be seen that the method provided in this embodiment is suitable for the restoration of paper murals. The pigment layer, paper layer and base layer of the repaired paper murals can be effectively bonded to the carriers at each layer. The original cracked, warped and deformed parts are all restored to flatness and firmly bonded. After the repair, there is no glare, discoloration and the like on the surface of the paper mural.

[0083] right Figure 4 The paper murals shown in the figure were ultrasonically tested before and after restoration, and the sound wave transmission data of 12 identical points were tested respectively, and the following data were obtained: Figure 5 The results shown by Figure 5It can be seen that the sound wave conduction velocity of the paper murals in the test area before restoration was 370m / s~550m / s, and the average sound wave conduction velocity was 450m / s. The sound wave cloud map showed that most of the murals were in the range of low sound wave conduction velocity, indicating that the cracking, warping and other phenomena of the paper murals had a serious impact on the stability of the paper murals; the sound wave conduction velocity of the paper murals in the test area after restoration was 520m / s~900m / s, and the average sound wave conduction velocity was 746m / s. The sound wave cloud map showed that the sound wave conduction velocity of most of the paper murals was significantly improved compared with that before the test, indicating that the cracking, warping and other diseases that affect the stability of the paper murals have been effectively controlled, and the overall stability of the paper murals has been further enhanced, further confirming the practicality, adaptability, safety, compatibility and reliability of the protection and restoration technical route of this plan.

[0084] At the same time, this solution has been successfully applied to the protection and restoration project of the paper murals in the stupa of Yongyou Temple in Chengde Mountain Resort. It has undergone a three-year natural cycle test and there has been no change in shape or color in the restoration area, indicating that the protection and restoration materials involved in this solution have good weather resistance and mature technology.

[0085] The embodiments of the present invention provide a paper mural repair material and application, and a paper mural repair method, which have at least the following advantages:

[0086] 1. Simple operation and reduced repair difficulty. Compared with the existing steam fumigation method, the repair method provided by the embodiment of the present invention does not need to strictly control the steam fumigation direction and steam flow rate, is simpler to operate, reduces uncertainties in the repair process, improves the probability of the integrity of the paper mural restoration, and reduces the probability of secondary damage during the paper mural restoration process.

[0087] 2. It can realize non-destructive restoration of paper murals. The repair material provided by the embodiment of the present invention is colorless and transparent after drying, and the reinforcing agent has good water solubility and will not cause secondary pollution to the paper murals; at the same time, the repair material has good infiltration and penetration properties, and has good reinforcement ability. In conjunction with the method provided by the embodiment of the present invention, the multi-layer, multi-material penetration, softening and reinforcement functions of the paper murals can be realized in one step, which reduces the operation procedures in the repair process and is conducive to the non-destructive restoration of the paper murals.

[0088] 3. Improve the efficiency of paper mural restoration. The steam fumigation method often requires a long fumigation time, and it is difficult to control the degree of water absorption of the area to be repaired during the fumigation process. In order to avoid excessive fumigation causing the material to absorb more water, multiple inspections are required. The repair operation is cumbersome and it is easy to cause secondary damage to the paper mural. In addition, after steam fumigation, reinforcement materials need to be added for reinforcement, and the repair efficiency is low. The method provided in the embodiment of the present invention can perform softening and reinforcement steps at the same time, thereby improving the repair efficiency; and during the softening and reinforcement process, absorbent cotton and plastic wrap are used for protection, so even if the softening of the paper mural needs to be checked, it will not cause secondary damage to the paper mural.

[0089] To sum up, the embodiments of the present invention provide a paper mural restoration material and application, and a paper mural restoration method, which can improve the restoration efficiency of paper murals, reduce the restoration difficulty of paper murals, and improve the restoration quality of paper murals while ensuring the principle of minimum intervention in cultural relics, and have better utilization value.

[0090] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A repair material for paper murals, characterized in that: It comprises a reinforcing agent and an osmotic softener, wherein the concentration of the reinforcing agent is 3 to 6 wt.%; The reinforcing agent includes acrylic emulsion, and the osmotic softener includes 1-4% ethanol.

2. The repair material according to claim 1, characterized in that The reinforcing agent is acrylic emulsion, the concentration of the reinforcing agent is 3wt.%, and the osmotic softener is 2% ethanol.

3. A method for repairing a paper mural, characterized in that: The method comprises covering the area to be repaired with a wet compress bearing material loaded with the repair material as claimed in claim 1 or 2, performing infiltration softening reinforcement on the area to be repaired, and then performing re-attachment reinforcement on the area to be repaired using a re-attachment tool.

4. The repair method according to claim 3, characterized in that: The time of penetration softening is ≥90s; Preferably, the osmotic softening time is 90 to 180 seconds.

5. The repair method according to claim 3, characterized in that: The repair material is infiltrated on the wet compress carrier material without dripping; The wet compress carrier material includes any one of absorbent cotton, non-woven fabric or washed fiber.

6. The repair method according to claim 3, characterized in that: The process of osmotic softening also includes covering the surface of the wet compress carrier material with an isolation material, wherein the isolation material includes at least one of a PVC film, a PE film, a PVDC film, a PP film or a silicon film.

7. The repair method according to claim 3, characterized in that: The re-sticking reinforcement includes applying pressure to the area to be repaired using the re-sticking tool, and the number of times of re-sticking is at least once.

8. The repair method according to claim 7, characterized in that: The number of times of re-sticking is three times, the first re-sticking includes covering the surface of the area to be repaired with a non-sticky material, and then applying pressure to the area to be repaired with a wooden pressure knife; the second re-sticking includes using a re-sticking reinforcement bag to press the area to be repaired; the third re-sticking includes using a supporting device to support and press the area to be repaired; Preferably, the non-adhesive material includes any one of glossy fiber paper or lens paper.

9. The repair method according to claim 8, characterized in that: Before the third re-sticking, the repair material seeping out around the area to be repaired is cleaned.

10. Use of the repair material according to claim 1 or 2 in mural restoration.

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