A fixing agent for the ink and pigment of palm-leaf scriptures, its preparation method and application

Abstract

The present invention provides a fixing agent for the ink and pigments on palm-leaf scriptures, its preparation method and application, which relate to the field of cultural relic protection and restoration. Calculated by weight parts, it includes the following raw material components: 1-15 parts of hydrophobically modified cellulose; 0.1-8 parts of natural vegetable oil; 0.1-5 parts of hydrophobic fumed silica; 30-80 parts of ethanol; 10-50 parts of n-butanol. Through the design of raw materials and ratios, the solution of the present invention prepares a fixing agent with excellent protection effects on both the ink and pigments on the surface of palm-leaf scriptures. It can effectively enhance the abrasion resistance, water resistance, acid resistance, alkali resistance and oxidation resistance of the ink and pigments on the palm-leaf scriptures, and improve the fixing force, stability and durability of the ink and pigments on the palm-leaf scriptures. Moreover, the raw materials used are all green, environmentally friendly and low-cost, and will not cause damage to the palm-leaf scripture body. The overall preparation method and application method are also simple and efficient, with low requirements for equipment and energy consumption.

Description

Technical Field

[0001] The present invention belongs to the field of cultural relic protection and restoration, and particularly relates to a fixing agent for the ink and pigments of palm-leaf scriptures, and a preparation method and application thereof. Background Art

[0002] Long before the invention of paper, the leaves of palm plants were widely used as carriers for writing and painting in Southeast Asia and South Asia. In Sanskrit, it is called "Pattra", and in Chinese, it is transliterated as "Beiduoluo" according to the pronunciation, simply referred to as "palm leaf". Palm-leaf scriptures are precious cultural heritages with palm leaves as carriers and various inks and pigments as recording materials, and are also one of the most precious original ancient documents in the world. The information content of these palm-leaf scriptures covers a wide range, including Buddhist scriptures, astronomy and calendars, history and philosophy, literature and art, laws and regulations, etc., and has high cultural, historical and artistic values. Due to the lofty status of palm-leaf scriptures in Buddhism, they have become an important carrier of cultural inheritance and national beliefs, and it is of great significance to protect and restore palm-leaf scriptures.

[0003] In addition to the common black ink, the information on the surface of palm-leaf scriptures also includes colored patterns containing pigments with complex components, and the colors can include black, red, yellow, blue, gold, etc. Moreover, the surface structure of palm leaves is very dense, and it is difficult for ink and pigments to penetrate into the leaf interior, and the fixing force is poor, resulting in the wear and shedding of the ink and pigment layers, the ink and pigment being blurred and difficult to read during the preservation and use of palm-leaf scriptures, seriously affecting the utilization of information and the excavation of value. Once the ink and pigments of palm-leaf scriptures fall off and are damaged, the information they carry will be lost forever and disappear. However, there is no reported research case on the reinforcement and protection of the ink and pigments of palm-leaf scriptures in the existing technology.

[0004] In summary, developing a safe, reliable, easy-to-operate and effective fixing agent for the ink and pigments of palm-leaf scriptures is one of the important means to rescue endangered palm-leaf scriptures. Summary of the Invention

[0005] The purpose of the present invention is to provide a fixing agent for the ink and pigments of palm-leaf scriptures, which is prepared by mixing and blending raw materials with low cost and easy to purchase, and a fixing agent with safety, reliability, excellent fixing force, stability and durability for various inks and pigments on the surface of palm-leaf scriptures is obtained.

[0006] To achieve the above purpose, the present invention provides a fixing agent for the ink and pigments of palm-leaf scriptures, which comprises the following raw material components by weight:

[0007]

[0008] In a preferred embodiment, it comprises the following raw material components by weight:

[0009]

[0010] In a preferred embodiment, by weight parts, it comprises the following raw material components:

[0011]

[0012]

[0013] In a preferred embodiment, by weight parts, it comprises the following raw material components:

[0014]

[0015] In a preferred embodiment, the hydrophobically modified cellulose includes one or more of ethyl cellulose, cellulose acetate, and hydroxypropyl cellulose.

[0016] In a preferred embodiment, the natural vegetable oil includes one or more of castor oil, clove oil, camphor oil, eucalyptus oil, and sesame oil.

[0017] In a preferred embodiment, the hydrophobic fumed silica includes one or more of Aerosil R974 hydrophobic fumed silica, Aerosil R972 hydrophobic fumed silica, and Aerosil R812S hydrophobic fumed silica.

[0018] In a preferred embodiment, the total of the weight parts is 100 parts.

[0019] Another object of the present invention is to provide a preparation method for a fixing agent for the ink and pigment of palm-leaf scriptures. By using simple steps, the raw materials can be evenly blended without the use of a high-temperature environment and high-power-consuming instrument and equipment.

[0020] To achieve the above object, the present invention provides a preparation method for a fixing agent for the ink and pigment of palm-leaf scriptures, which specifically includes the following steps:

[0021] Accurately weigh the raw materials used by weight parts;

[0022] Mix n-butanol and ethanol evenly to obtain a mixed solvent;

[0023] Divide the obtained mixed solvent into mixed solvent a and mixed solvent b according to a volume ratio of 1:(0.1 - 2);

[0024] Mix the hydrophobically modified cellulose, natural vegetable oil, and mixed solvent a, and stir until the hydrophobically modified cellulose is completely dissolved to obtain a mixed solution;

[0025] Add the mixed solvent b to the hydrophobic fumed silica and disperse evenly to obtain a hydrophobic fumed silica dispersion;

[0026] Mix the mixed solution and the hydrophobic fumed silica dispersion, and then perform ultrasonic dispersion to obtain the palm leaf scripture ink and color fixing agent.

[0027] In a preferred embodiment, in the step of preparing the mixed solution, the volume ratio of the mixed solvent a to the mixed solvent b is 1:(0.2 - 1).

[0028] In a preferred embodiment, in the step of preparing the mixed solution, to improve the reaction efficiency, the hydrophobic modified cellulose, natural vegetable oil and the mixed solvent a can be mixed and then heated to 35 - 40 °C and stirred.

[0029] In a preferred embodiment, in the step of preparing the hydrophobic fumed silica dispersion, to improve the reaction efficiency, the ultrasonic stirring method can be adopted, and ultrasonic treatment is carried out for 5 - 30 minutes with ultrasonic waves of 20 - 60 kHz.

[0030] In a preferred embodiment, in the step of preparing the palm leaf scripture ink and color fixing agent, the conditions for ultrasonic dispersion are: ultrasonic treatment is carried out for 5 - 30 minutes with ultrasonic waves of 20 - 60 kHz.

[0031] Another object of the present invention is to provide an application of a color fixing agent for palm leaf scripture ink and colorant. The palm leaf scripture ink and color fixing agent is evenly applied to the surface of the ink and colorant to be strengthened, and then left to stand and dried. The application method is simple, has no harsh limitations on operators and the working environment, and has excellent application effects.

[0032] In a preferred embodiment, the application method can adopt conventional methods mastered by those skilled in the art, such as brushing, spraying, etc.

[0033] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0034] 1. Through the design of raw materials and ratios, the present invention's solution prepares a color fixing agent with excellent protective effects on both the ink and colorant on the surface of the palm leaf scripture. It can effectively enhance the abrasion resistance, water resistance, acid resistance, alkali resistance and oxidation resistance of the ink and colorant on the palm leaf scripture cultural relics, and improve the fixing force, stability and durability of the ink and colorant on the palm leaf scripture.

[0035] 2. In the solution of the present invention, the hydrophobic modified cellulose is one of the main raw materials. As a film-forming substance, it is close to the palm leaf scripture body and is more likely to reinforce the ink and colorant on the surface of the palm leaf scripture.

[0036] Natural vegetable oil is the oil extracted from plants and is also a green and natural plant raw material, which is mild and environmentally friendly. Moreover, natural vegetable oil can interact intermolecularly with hydrophobically modified cellulose, achieving an effect similar to that of a plasticizer, and can effectively improve the toughness and strength of the hydrophobically modified cellulose film.

[0037] Hydrophobic fumed silica also has good hydrophobicity, which can improve the water resistance to the ink and pigments on the surface of the palm leaf scriptures. In addition, hydrophobic fumed silica can adjust the surface roughness of the film, producing a diffuse reflection effect and reducing the reflectivity of the ethyl cellulose film, having a matting effect.

[0038] Using hydrophobically modified cellulose, natural vegetable oil and hydrophobic fumed silica as the main raw materials, the three components can synergistically enhance each other's effects, greatly enhancing the treatment effect of the fixing agent on the palm leaf scripture material. Furthermore, it has excellent fixing power, stability and durability for the ink and various color pigments attached to its surface.

[0039] In addition, the present invention prepares a mixed solvent from ethanol and n-butanol, which can not only dissolve hydrophobically modified cellulose and natural vegetable oil, but also disperse hydrophobic fumed silica well. Moreover, introducing an appropriate amount of n-butanol can reduce the moisture absorption of the fixing agent, contributing to the film-forming stability during drying. However, excessive n-butanol will lead to too long film-forming time. Therefore, the present invention designs the aforementioned dosage ratio.

[0040] It can be seen from the raw materials used that the raw materials in the solution of the present invention are all green, environmentally friendly, low-cost, and natural raw materials are used as much as possible, which will not damage the palm leaf scripture itself, and are safe and reliable.

[0041] 3. The fixing agent for palm leaf scripture ink and pigments prepared by the present invention has long-term stability and long-term effectiveness, can be stored sealed for a long time in a cool and ventilated place without deterioration, and has good commercial prospects.

[0042] 4. The preparation process and usage method in the solution of the present invention are simple, efficient, green and safe, and are especially suitable for large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] From the following detailed description of the embodiments of the present invention in conjunction with the drawings, these and / or other aspects and advantages of the present invention will become clearer and easier to understand, where:

[0044] Figure 1 FIG. 1 is a physical photograph of the fixing agent for palm leaf scripture ink and pigments and after being stored at room temperature for 1 month.

[0045] FIG. 2 is a comparison diagram of the microscopic morphology before and after strengthening various palm leaf scripture inks and pigments.

[0046] FIG. 3 is a comparison diagram of various palm leaf scripture inks and pigments before and after being soaked in water.

[0047] Figure 4 is a comparison diagram of various palm-leaf manuscript ink marks and pigments before and after soaking in hydrochloric acid solution.

[0048] Figure 5 is a comparison diagram of various palm-leaf manuscript ink marks and pigments before and after soaking in sodium hydroxide solution.

[0049] Figure 6 is a comparison diagram of various palm-leaf manuscript ink marks and pigments before and after soaking in hydrogen peroxide solution. Detailed implementation manners

[0050] In order to enable those skilled in the art to better understand the technology and methods of the present invention, the following further details the present invention in conjunction with the drawings and specific implementation manners, but it should be understood that the protection scope of the present invention is not limited by the specific implementation manners.

[0051] The embodiment of the present invention provides a fixing agent for palm-leaf manuscript ink marks and pigments and its application, which solves the problems that the ink marks and pigments on the surface of palm-leaf manuscripts are not resistant to friction and are easy to fall off, and effectively improves the fixing force, stability and durability of the ink marks and pigments.

[0052] The following details the technical solutions of the present application through specific examples:

[0053] Unless otherwise specified, the technical means used in the present invention are conventional means well known to those skilled in the art. All kinds of raw materials, reagents, instruments and equipment used in the present invention can be obtained through market purchase or can be prepared by existing methods. The ethanol used in the present invention is anhydrous ethanol, and other reagents are of analytical grade unless otherwise specified. The room temperature described in the present invention is 25 ± 5 °C.

[0054] In the embodiment of the present invention, the ethyl cellulose used is provided by Shanghai Aladdin Biochemical Technology Co., Ltd.; the castor oil and clove oil used are provided by Jiangxi Global Natural Flavors Co., Ltd.; the hydrophobic fumed silica used is provided by Shaoxing Lijie Chemical Co., Ltd., and the model is Aerosil R974.

[0055] Example 1

[0056] Taking the preparation of 100 g of the fixing agent for palm-leaf manuscript ink marks and pigments of the present invention as an example, the raw materials used and their mass percentages are as follows:

[0057]

[0058] 1. Prepare a mixed solvent of n-butanol and ethanol

[0059] Add 26.04 g of n-butanol to a sealed glass bottle with a lid containing 60.76 g of ethanol, and use a vortex stirrer to mix well at a rotation speed of 1500 rpm for 30 min to prepare 86.80 g of a mixed solvent.

[0060] 2. Prepare a mixed solution of ethyl cellulose, castor oil, and clove oil

[0061] Weigh 8 g of ethyl cellulose, 2.4 g of castor oil, and 0.8 g of clove oil, add them to a sealed glass bottle with a lid, then add 63.8 g of the mixed solvent prepared in Step 1. Heat it to 40 °C using a magnetic heating stirrer and stir at a speed of 1500 rpm until all the ethyl cellulose is dissolved to prepare the mixed solution.

[0062] 3. Prepare an Aerosil R974 hydrophobic fumed silica dispersion

[0063] Weigh 2.0 g of Aerosil R974 hydrophobic fumed silica and add it to a sealed glass bottle with a lid. Then add 23.0 g of the mixed solvent prepared in Step 1 and perform ultrasonic treatment using an ultrasonic generator with a power of 100 watts and a frequency of 40 kHz to prepare the Aerosil R974 hydrophobic fumed silica dispersion.

[0064] 4. Prepare a palm leaf manuscript ink and colorant fixing agent

[0065] Add the mixed solution of ethyl cellulose, castor oil, and clove oil prepared in Step 2 and the Aerosil R974 hydrophobic fumed silica dispersion prepared in Step 3 to a sealed glass bottle with a lid for mixing. Perform ultrasonic treatment for 30 minutes using an ultrasonic generator with a power of 100 watts and a frequency of 40 kHz to prepare the palm leaf manuscript ink and colorant fixing agent.

[0066] Take 25 g of the dispensed sample and observe its appearance as shown in Figure 1 a. After being placed at room temperature for 1 month, its appearance is as shown in Figure 1 b. It can be seen from the figure that Figure 1 b is Figure 1 basically the same as a, and no precipitation or other observable changes have occurred, indicating that the palm leaf manuscript ink and colorant fixing agent has good dispersion stability.

[0067] Example 2

[0068] Taking the preparation of 100 g of the palm leaf manuscript ink and colorant fixing agent of the present invention as an example, the raw materials used and their mass percentages are as follows:

[0069]

[0070] Except for changing the preparation ratio, all operation methods and steps are exactly the same as those in Example 1.

[0071] In this example, the prepared palm-leaf manuscript ink and pigment fixing agent was tested and found to have a certain fixing effect on various inks and pigments on the surface of the palm-leaf manuscript. However, compared with Example 1, the palm-leaf manuscript ink and pigment fixing agent obtained in Example 2 had some obvious reflection after film formation due to the relatively low content of Aerosil R974 hydrophobic fumed silica, and the matting effect was average.

[0072] Example 3

[0073] Taking the preparation of 100 g of the palm-leaf manuscript ink and pigment fixing agent of the present invention as an example, the raw materials used and their mass percentages are as follows:

[0074]

[0075] Except for changing the formulation ratio, all operation method steps were exactly the same as those in Example 1.

[0076] The palm-leaf manuscript ink and pigment fixing agent prepared in this example was tested and found to have a certain fixing effect on various inks and pigments on the surface of the palm-leaf manuscript. However, compared with Example 1, the palm-leaf manuscript ink and pigment fixing agent obtained in Example 3 had a relatively low amount of natural vegetable oil, and after the coating film dried, the cellulose film was relatively brittle and prone to cracking, resulting in a reduction in mechanical properties.

[0077] Example 4

[0078] Taking the preparation of 100 g of the palm-leaf manuscript ink and pigment fixing agent of the present invention as an example, the raw materials used and their mass percentages are as follows:

[0079]

[0080]

[0081] Except for changing the formulation ratio, all operation method steps were exactly the same as those in Example 1.

[0082] The palm-leaf manuscript ink and pigment fixing agent prepared in this example could not produce a fixing effect on various inks and pigments on the surface of the palm-leaf manuscript. Compared with Example 1, the palm-leaf manuscript ink and pigment fixing agent obtained in Example 4 used a lower content of butanol as the mixed solvent (butanol: ethanol = 1:19), but was prone to moisture absorption during the coating process, and the film obtained after drying had a milky appearance and low transparency, affecting the light penetration performance, and thus affecting the presentation effect and fixing ability of the inks and pigments on the surface of the palm-leaf manuscript.

[0083] Effect Example

[0084] In order to determine the optimal process conditions of the present invention, the inventors conducted a large number of laboratory research tests, and finally optimized and determined that the formulation of Example 1 was the optimal condition.

[0085] The application method and effects of the best ratio of palm-leaf scriptures ink marks and colorant fixing agent in Example 1 are as follows:

[0086] Experimental method: The operation process of the actual application of the palm-leaf scriptures reinforcing agent: On the surface of the palm-leaf scriptures with various ink marks and colorants to be reinforced, evenly apply a layer of the fixing agent prepared in Example 1, and let it stand until the surface is dry.

[0087] Experimental instruments: CR-10PLUS portable color difference meter, produced by Konica Minolta (China) Investment Co., Ltd.; Dino-Lite AM4115 portable digital microscope, produced by Anpeng Technology Co., Ltd.; Preset color fastness friction meter, produced by Wenzhou Darong Textile Standard Instrument Factory.

[0088] Effect Example 1

[0089] Morphology characterization and color difference change of palm-leaf scriptures ink marks and colorants before and after using the palm-leaf scriptures ink marks and colorant fixing agent:

[0090] Testing method: The invention uses a CR-10PLUS portable color difference meter to test the color difference change before and after the reinforcement of different colorants. Referring to the color change degree and color change grade rating standard in GB / T 1766-2008 "Rating method for the aging of paint and varnish coatings", see Table 1.

[0091] Table 1 Rating standard for color change degree and color change grade of palm-leaf scriptures ink marks and colorants

[0092] Level ΔE Degree of color change 0 ≦1.5 No color change 1 1.6～3.0 Very slight color change 2 3.1～6.0 Slight color change 3 6.1～9.0 Obvious color change 4 9.1～12.0 Large color change 5 Above 12.0 Severe color change

[0093] Results and discussions:

[0094] The experimental results are shown in Table 2. Among them, the color difference values of the black, yellow, and gold samples before and after the use of the fixing agent are less than 1.5, belonging to no color change; the color difference values of the red and blue samples before and after the use of the fixing agent are less than 3.0, belonging to very slight color change.

[0095] At the same time, a Dino-Lite AM4115 portable digital microscope was used to observe the microscopic morphology before and after fixation. The specific results are shown in Figure 2. Among them, Figure 2a is the comparison diagram of the microscopic morphology of the black ink marks on the palm-leaf scriptures before and after reinforcement, Figure 2b is the comparison diagram of the microscopic morphology of the blue colorant on the palm-leaf scriptures before and after reinforcement, Figure 2c is the comparison diagram of the microscopic morphology of the yellow colorant on the palm-leaf scriptures before and after reinforcement, Figure 2d is the comparison diagram of the microscopic morphology of the red colorant on the palm-leaf scriptures before and after reinforcement, Figure 2e is the comparison diagram of the microscopic morphology of the gold colorant on the palm-leaf scriptures before and after reinforcement. As can be seen from the above figures, there is no obvious change in the ink marks and colorants before and after reinforcement, indicating that the palm-leaf scriptures ink marks and colorant fixing agent basically maintain their original appearance.

[0096] Table 2 Color difference changes of palm-leaf manuscript ink and pigments before and after reinforcement

[0097]

[0098]

[0099] Effect Example 2

[0100] Stability test of palm-leaf manuscript ink and pigments

[0101] Test method: Refer to DA / T 16-1995 "Test method for durability of archival writing materials" for testing. The test method is shown in Table 3. Immerse the control sample without applying the color-fixing agent and the simulated samples of palm-leaf manuscript ink and pigments applied with the color-fixing agent in distilled water, 0.1N HCI solution, 0.1N NaOH solution, and 1% H 2 O 2 solution at the same time. After taking them out, rinse them three times with distilled water and expose them to the air in a place without direct sunlight indoors for more than 24 hours for testing.

[0102] Table 3 Stability test conditions of palm-leaf manuscript ink and pigments

[0103] Project name Test conditions Test time hr Water immersion Room temperature, 60 ml distilled water 1 / 6 Acid resistance Room temperature, 60 ml 0.1N HCI solution 1 / 6 Alkali resistance Room temperature, 60 ml 0.1N NaOH solution 1 / 6 Oxidation resistance <![CDATA[At room temperature, 60 ml of 1% H 2 O 2 solution]]> 1 / 6 Friction resistance Placed on a color fastness friction tester, rubbed back and forth 10 times /

[0104] Stability evaluation method of palm-leaf manuscript ink and pigments: Color change of palm-leaf manuscript ink and pigments before and after reinforcement with the reinforcing agent of the present invention - color difference test: The 1976 CIE L*a*b* color coordinate system is used to monitor the color change after the stability test. The color difference value is calculated according to the following formula:

[0105] ΔE = [(ΔL * ) 2 +(Δa * ) 2 +(Δb * ) 2 1 / 2

[0106] In the formula, △L* represents the change in lightness of the color before and after reinforcement and stability test, △a* represents the change in red and green before and after reinforcement and stability test, △b* represents the change in yellow and blue before and after reinforcement and stability test. The larger △E is, the greater the color change is, and vice versa. In this experiment, the degree of color change is judged according to the GB / T11186.2 standard.

[0107] Results and discussion: The results of the water immersion experiment are shown in Figure 3. Among them, Figure 3a is the comparison diagram of the black ink of the palm-leaf manuscript before and after water immersion, Figure 3b is the comparison diagram of the blue pigment of the palm-leaf manuscript before and after water immersion, Figure 3c is the comparison diagram of the yellow pigment of the palm-leaf manuscript before and after water immersion, Figure 3d ​This is a comparison of the palm leaves before and after being soaked in red pigment. Figure 3e This is a comparison of palm leaves before and after being soaked in gold pigment.

[0108] The results of the hydrochloric acid solution immersion test are shown in Figure 4, where: Figure 4a This is a comparison of the black ink of the palm leaf before and after being soaked in hydrochloric acid solution. Figure 4b This is a comparison of the palm leaves before and after being soaked in a hydrochloric acid solution with blue pigment. Figure 4c This is a comparison of palm leaves before and after being soaked in a hydrochloric acid solution with yellow pigment. Figure 4d This is a comparison of palm leaves before and after being soaked in a hydrochloric acid solution with red pigment. Figure 4e This is a comparison of palm leaves before and after being soaked in hydrochloric acid solution with golden pigment.

[0109] The results of the sodium hydroxide solution immersion experiment are shown in Figure 5, where: Figure 5a This is a comparison of the black ink of the Bayeux Sutra before and after being exposed to sodium hydroxide solution. Figure 5b This is a comparison of the blue pigment of the Bay Leaf Sutra before and after being added to the sodium hydroxide solution. Figure 5c This is a comparison of the yellow pigment of the palm leaf before and after being added to the sodium hydroxide solution. Figure 5d This is a comparison of the red pigment of the palm leaf before and after being added to the sodium hydroxide solution. Figure 5e This is a comparison of the golden pigment of the palm leaf before and after being added to the sodium hydroxide solution.

[0110] The results of the hydrogen peroxide solution immersion experiment are shown in Figure 6, where: Figure 6a This is a comparison of the black ink of the Bayeux Sutra before and after being exposed to hydrogen peroxide solution. Figure 6b This is a comparison of the blue pigment of the Bayeux Sutra before and after being exposed to hydrogen peroxide solution. Figure 6c This is a comparison of the yellow pigment of the palm leaf before and after being exposed to hydrogen peroxide solution. Figure 6d This is a comparison of the red pigment of the Bay Leaf Sutra before and after being exposed to hydrogen peroxide solution. Figure 6e This is a comparison of the golden pigment of the palm leaf before and after being added to the hydrogen peroxide solution.

[0111] The bottom samples in Figures 3 to 6, namely the samples numbered "KB", are all blank control samples. It can be seen that after being coated with the color fixing agent prepared by the present invention, the acid resistance, alkali resistance and oxidation resistance are improved compared with the blank control sample, indicating that the prepared palm leaf scripture ink and color fixing agent can effectively improve the stability of the ink and color.

[0112] In this embodiment, the test results of the stability of the palm-leaf manuscript ink and pigment are shown in Table 4. The test results of the color difference after the treatment of the palm-leaf manuscript ink and pigment indicate that the color difference of the control sample without applying the reinforcing agent changes significantly, mostly belonging to large and severe discoloration, while the color difference of the simulated sample coated with the color-fixing agent changes little, mostly belonging to very slight and slight discoloration. This shows that the color-fixing effect of the color-fixing agent used for the palm-leaf manuscript ink and pigment is obvious, and it has water resistance, acid resistance, alkali resistance and oxidation resistance.

[0113] Table 4 Test Results of the Stability of Palm-Leaf Manuscript Ink and Pigment

[0114]

[0115]

[0116] Effect Example 3

[0117] Colorfastness Test of Palm-Leaf Manuscript Ink and Pigment

[0118] Test method: Place the palm-leaf manuscript ink and pigment coated with the color-fixing agent on a colorfastness friction tester, and test the colorfastness after color fixation through the change of color difference. The test results of the colorfastness of the palm-leaf manuscript ink and pigment are shown in Table 5.

[0119] Table 5 Test Results of the Colorfastness of Palm-Leaf Manuscript Ink and Pigment

[0120]

[0121] Results and Discussion: The test results of the color difference after the friction of the palm-leaf manuscript ink and pigment indicate that the color-fixing effect of the color-fixing agent for the palm-leaf manuscript ink and pigment is obvious, and the adhesion between the color-fixing agent and the ink and pigment is strong.

[0122] In summary, the color-fixing agent for the palm-leaf manuscript ink and pigment of the present invention can maintain the original appearance of various handwriting materials, significantly improve the water resistance, acid resistance, alkali resistance, oxidation resistance and colorfastness of the ink and pigment on the surface of the palm-leaf manuscript, thereby promoting the long-term preservation of the ink and pigment on the palm-leaf manuscript cultural relics and protecting the historical, religious, literary and other values of the palm-leaf manuscript to the greatest extent.

[0123] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that the above color-fixing agent formulations can be adjusted in various forms to meet different application scenarios. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical applications, so that those skilled in the art can implement and utilize various different exemplary embodiments of the present invention as well as various different selections and changes. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A fixing agent for the ink and pigment of palm-leaf scriptures, characterized in that, by weight parts, it comprises the following raw material components: Hydrophobically modified cellulose 3 - 10 parts; Natural vegetable oil 1 - 5 parts; Hydrophobic fumed silica 1 - 5 parts; Ethanol 40 - 70 parts; n-Butanol 20 - 30 parts; The natural vegetable oil includes one or more of castor oil, clove oil, camphor oil, eucalyptus oil, and sesame oil; The hydrophobically modified cellulose includes one or more of ethyl cellulose, cellulose acetate, and hydroxypropyl cellulose; The total of the weight parts is 100 parts.

2. The fixing agent for the ink and pigment of palm-leaf scriptures according to claim 1, characterized in that, by weight parts, it comprises the following raw material components: Hydrophobically modified cellulose 8 parts; Natural vegetable oil 3.2 parts; Hydrophobic fumed silica 2.0 parts; Ethanol 60.76 parts; n-Butanol 26.04 parts.

3. The fixing agent for the ink and pigment of palm-leaf scriptures according to claim 1, characterized in that, The hydrophobic fumed silica includes one or more of AerosilR974 hydrophobic fumed silica, Aerosil R972 hydrophobic fumed silica, and Aerosil R812S hydrophobic fumed silica.

4. The preparation method of the fixing agent for the ink and pigment of palm-leaf scriptures according to any one of claims 1 - 3, characterized in that, it comprises the following steps: Accurately weigh the raw materials used by weight parts; Mix n-butanol and ethanol evenly to obtain a mixed solvent; Divide the obtained mixed solvent into mixed solvent a and mixed solvent b according to a volume ratio of 1:(0.1 - 2); Mix the hydrophobically modified cellulose, natural vegetable oil and mixed solvent a, and stir until the hydrophobically modified cellulose is completely dissolved to obtain a mixed solution; Add mixed solvent b to the hydrophobic fumed silica and disperse evenly to obtain a hydrophobic fumed silica dispersion; After mixing the mixed solution and the hydrophobic fumed silica dispersion, perform ultrasonic dispersion to obtain the fixing agent for the ink and pigment of palm-leaf scriptures.

5. The preparation method of the fixing agent for the ink and pigment of palm-leaf scriptures according to claim 4, characterized in that, The conditions of the ultrasonic dispersion are: perform ultrasonic treatment for 5 - 30 minutes with ultrasonic waves of 20 - 60 kHz.

6. The application of the fixing agent for the ink and pigment of palm-leaf scriptures according to any one of claims 1 - 3, characterized in that, it comprises the following steps Evenly apply the fixing agent for the ink and pigment of palm-leaf scriptures on the surface of the ink and pigment to be fixed, and let it stand and dry.

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