A developer for fading ink stains in Bayeux manuscripts, its preparation method and application method

Abstract

This invention provides a color developer for faded ink stains on Palmyra manuscripts, along with its preparation and application methods, relating to the field of cultural relic conservation and restoration technology. Specifically, it includes component A and component B; component A comprises hydrophobic fumed silica and n-butanol; component B comprises hydrophobically modified cellulose, liquid paraffin, and n-butanol; mixing components A and B yields the color developer for faded ink stains on Palmyra manuscripts. This invention uses low-cost, readily available, and environmentally friendly raw materials to prepare components A and B separately. Through a synergistic effect, the two components enhance the color and clarity of faded ink stains on the surface of the Palmyra manuscript, achieving a re-coloring effect. The prepared color developer is safe and reliable, exhibits significant color development, and also possesses excellent resistance to dry heat aging and ultraviolet aging. Furthermore, it does not alter the appearance of the Palmyra manuscript, has minimal interference with the manuscript itself, and will not damage the manuscript after use.

Description

Technical Field

[0001] This invention belongs to the field of cultural relic protection and restoration technology, specifically relating to a color developer for faded ink marks in palm leaf manuscripts, as well as its preparation and application methods. Background Technology

[0002] As early as the 6th century BC, ancient Indians used palm leaves as writing material. After drying, steaming, polishing, oiling, cutting, and trimming, palm leaves could be used to record information in literature, music, history, medicine, mathematics, and astronomy, forming palm-leaf manuscripts. These manuscripts have gradually become a precious part of human cultural heritage, providing important historical evidence for the history of ancient cultural exchange. Therefore, the protection and restoration of palm-leaf manuscripts has become an important topic in cultural heritage protection research.

[0003] The inscriptions on the surface of palm-leaf manuscripts are crucial information for interpreting their content and embody their historical, cultural, and scientific value, making the preservation of the ink on these manuscripts particularly important. However, after thousands of years, these palm-leaf manuscripts have suffered varying degrees of damage, with ink fading being a frequent and difficult problem to restore, posing obstacles and challenges to the deciphering and conservation of these manuscripts. Regarding the issue of re-inking faded ink, the National Library of Kolkata in India, the British Museum, and the University Museum of Sri Lanka have proposed methods to re-ink the palm-leaf manuscripts. However, this method violates the principle of authenticity, and the research and application of ink revealing agents for faded ink on palm-leaf manuscripts remains undeveloped.

[0004] The prior art, CN117025030A, discloses a fixing agent for ink and pigments in Palmyra manuscripts, its preparation method, and its application. This method produces a fixing agent that provides excellent protection for both ink and pigments on the surface of Palmyra manuscripts. It improves the adhesion, stability, and durability of the ink and pigments by enhancing their resistance to abrasion, water, acid, alkali, and oxidation. However, this fixing agent only reinforces the existing writing on the Palmyra manuscript and cannot improve the legibility of faded writing. During our research and development, we also attempted to use this method for color development experiments, but the results showed that after treating faded ink on the Palmyra manuscript with this fixing agent, the original ink remained unchanged and difficult to identify.

[0005] In summary, the proposed solutions to the technical challenges of restoring faded ink from the Bayeux manuscripts are highly effective. Developing a color developer for fading ink from the Bayeux manuscripts that is color-developing, compatible, safe, and stable has significant practical needs and application prospects. Summary of the Invention

[0006] The purpose of this invention is to provide a color developer for faded ink marks in Palmyra manuscripts, effectively solving the technical problem of re-reviving faded and blurred ink marks in these manuscripts. This invention uses low-cost, readily available, and environmentally friendly raw materials to prepare components A and B. Through a synergistic effect, these components enhance the color and clarity of faded ink marks on the surface of the Palmyra manuscript, thus achieving a re-revealing effect. The prepared color developer is safe and reliable, has a significant color-developing effect, and can also improve the stability and durability of the ink marks.

[0007] To achieve the above objectives, the present invention provides a color developer for fading ink marks in Bayeux manuscripts, comprising component A and component B;

[0008] Component A includes hydrophobic fumed silica and n-butanol;

[0009] Component B includes hydrophobically modified cellulose, liquid paraffin, and n-butanol;

[0010] Mixing component A and component B yields a developer that can revitalize faded ink marks on the surface of the Bayeux manuscript.

[0011] In a preferred embodiment, the mass ratio of component A to component B is 1:(1-5); preferably, the mass ratio of component A to component B is 1:(3-4); more preferably, the mass ratio of component A to component B is 1:3.65.

[0012] In a preferred embodiment, the mass ratio of hydrophobic fumed silica to n-butanol in component A is 1:(5-35); more preferably, the mass ratio of hydrophobic fumed silica to n-butanol in component A is 1:(10-30); more preferably, the mass ratio of hydrophobic fumed silica to n-butanol in component A is 1:13.33. In this invention, using a lower content of hydrophobic fumed silica, when mixed with component B, can produce a synergistic effect, reducing the surface light scattering effect and improving the color development effect of faded characters in the Bayeux manuscript.

[0013] In a preferred embodiment, the hydrophobic fumed silica includes one or more of Aerosil R812S hydrophobic fumed silica, Aerosil R972 hydrophobic fumed silica, and Aerosil R974 hydrophobic fumed silica.

[0014] In a preferred embodiment, the mass ratio of hydrophobic modified cellulose, liquid paraffin, and n-butanol in component B is 1:(0.5-4):(5-30); preferably, the mass ratio of hydrophobic modified cellulose, liquid paraffin, and n-butanol in component B is 1:(1-2):(5-20); more preferably, the mass ratio of hydrophobic modified cellulose, liquid paraffin, and n-butanol in component B is 1:1.25:7.56.

[0015] In this invention, liquid paraffin serves as a filler for the air gaps between ink marks and between ink marks and palm leaf components, reducing internal light scattering and thus producing a color-developing effect. Excessive liquid paraffin may result in overfilling, significantly impacting the appearance of the palm leaf manuscript and causing surface wetness; conversely, insufficient liquid paraffin will result in poor filling and failure to achieve the desired color development. Liquid paraffin is colorless, odorless, and stable, exhibiting good compatibility with cultural relics. This invention is the first to report the use of liquid paraffin as a material for developing ink color.

[0016] In this invention, hydrophobically modified cellulose is used as a skeleton material to assist the liquid paraffin in filling the air layer. Hydrophobically modified cellulose is weather-resistant, maintains its effectiveness for a long time, and, being similar to the main components of the Bayeux Manuscript, minimizes interference with the Bayeux Manuscript in terms of material composition.

[0017] In this invention, n-butanol is selected as the sole solvent because it has excellent solubility for hydrophobically modified cellulose and liquid paraffin. Furthermore, n-butanol exhibits low hygroscopicity during evaporation, enabling the hydrophobically modified cellulose to achieve good film-forming properties. In addition, ethanol has poor miscibility with liquid paraffin; although it is used in color-fixing agents in disclosed technologies, it cannot be used as a solvent component in the color-developing agent of this invention.

[0018] In a preferred embodiment, the hydrophobically modified cellulose comprises one or both of cellulose acetate and ethyl cellulose;

[0019] The liquid paraffin is in a liquid state at 0-50℃.

[0020] Another objective of this invention is to provide a method for preparing a developer for fading ink stains in Bayeux manuscripts, which uses simple and quick steps to uniformly mix the raw materials without the need for special equipment or large instruments.

[0021] To achieve the above objectives, the present invention provides a method for preparing a developer for fading ink stains in Bayeux manuscripts, specifically comprising the following steps:

[0022] Preparation of component A: Accurately weigh the raw materials according to the ratio, add the hydrophobic fumed silica to n-butanol, and ultrasonically disperse evenly to obtain a hydrophobic fumed silica dispersion;

[0023] Preparation of component B: Accurately weigh the raw materials according to the ratio, mix the hydrophobic modified cellulose, liquid paraffin and n-butanol, and use vortex stirring until the hydrophobic modified cellulose is completely dissolved to obtain a cellulose mixed solution;

[0024] Mix components A and B evenly according to the specified ratio, and then disperse them evenly by ultrasonication to obtain the color developer for the faded ink marks of the Bayeux manuscript.

[0025] In a preferred embodiment, when preparing component A and mixing component A and component B, the ultrasonic dispersion conditions are all: ultrasonic treatment with ultrasound at 20-60 kHz for 5-30 minutes.

[0026] In a preferred embodiment, when preparing component B, the vortex stirring conditions are: stirring at a speed of 1000-2500 rpm for 20-60 minutes.

[0027] In a preferred embodiment, when preparing component B, in order to improve the dispersion efficiency, n-butanol, hydrophobically modified cellulose and liquid paraffin can be mixed, heated to 35-50 degrees Celsius and then vortexed.

[0028] Another objective of this invention is to provide a method for using a developer for fading ink stains on the Bayeux manuscript. The developer is applied evenly to the area of ​​the Bayeux manuscript surface where the ink stains are to be developed, and then allowed to stand and dry. The overall method is simple and efficient, with no stringent limitations on operators or the working environment, and it is highly effective in re-developing faded ink stains on the surface of the Bayeux manuscript.

[0029] In a preferred embodiment, the application method can be a conventional method known to those skilled in the art, such as brushing or spraying.

[0030] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0031] 1. In terms of raw materials, the present invention uses hydrophobic fumed silica to make component A, which can regulate the roughness of the material surface after color development, reduce reflectivity by generating diffuse reflection effect, and play a matting effect; in addition, hydrophobic fumed silica also has good hydrophobicity, which can improve the water resistance of the ink of the Bayeux manuscript after being applied to the surface of the Bayeux manuscript.

[0032] This invention uses hydrophobically modified cellulose and liquid paraffin as component B. The hydrophobically modified cellulose, acting as a film-forming material, closely resembles the body of the Bayeux Manuscript, thus better treating the ink stains on its surface. Furthermore, the hydrophobically modified cellulose exhibits excellent weather resistance, protecting the ink stains and improving their durability. In existing technologies, liquid paraffin is typically used as a non-polar solvent or lubricant, but this invention creatively uses it as one of the effective components of the color developer. Verification has shown that the combination of hydrophobically modified cellulose and liquid paraffin can fill the air layers between ink stains and between ink stains and Bayeux Manuscript components, resulting in a more matched refractive index of the filling medium, reducing internal light scattering effects, and thus achieving the color-developing effect. In addition, liquid paraffin is odorless, colorless, and highly inert; its combination with component A does not produce negative effects but rather enhances the matting effect of hydrophobic fumed silica.

[0033] This invention uses n-butanol as a solvent, which not only disperses hydrophobic fumed silica but also dissolves hydrophobically modified cellulose and liquid paraffin. Furthermore, n-butanol is a natural substance with low hygroscopicity, preventing phase separation caused by moisture in the air during evaporation, thus resulting in a film with excellent transparency and better performance of the color developer.

[0034] As can be seen from the raw materials used, the raw material formula in this invention is green and environmentally friendly, with low cost. Furthermore, the selection concept uses mild natural substances as much as possible, which will not damage the palm leaf manuscript itself. The color developer is relatively safe and reliable.

[0035] 2. This invention, through the design of raw material selection and composition ratio, prepares a color developer that effectively reveals faded ink marks on the surface of Palmyra manuscripts. Through the synergistic effect between components A and B, it effectively enhances the clarity and color development of faded and blurred ink marks on the Palmyra manuscripts, producing a 1+1>2 effect. Furthermore, the color developer also possesses excellent resistance to dry heat aging and ultraviolet aging, while not altering the appearance of the Palmyra manuscript artifact, causing minimal interference to the manuscript itself, and will not damage the Palmyra manuscript after use.

[0036] 3. The color developer for the faded ink stains of the Bayeux manuscript prepared by this invention can be stored in a sealed container in a cool, ventilated place for a long period of time. It exhibits excellent dispersibility, long-term stability, and long-term effectiveness. It can be used immediately after preparation, without requiring immediate application, which is beneficial for practical use and shows good commercial prospects.

[0037] 4. The color developer for fading ink marks in Bayeux manuscripts provided in this invention has a simple and convenient preparation process, is easy to use, does not require special skills training, and is suitable for large-scale production and application. Attached Figure Description

[0038] These and / or other aspects and advantages of the present invention will become clearer and more readily understood from the following detailed description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 The developer used to fade ink marks in the Bayeux manuscript (left image) and a photograph of the actual product after being stored at room temperature for one month (right image);

[0040] Figure 2 shows the grayscale value changes before and after the faded ink marks on the front of the Bayeux manuscript reappear; among them, Figure 2a 1a shows the change in grayscale values ​​before color development, and 2b shows the change in grayscale values ​​after color development.

[0041] Figure 3 shows the grayscale value changes before and after the faded ink marks on the reverse side of the Bayeux manuscript became visible; among them, Figure 3a 3b shows the grayscale value changes before color development, and 3c shows the grayscale value changes after color development. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0043] This invention provides a color developer for faded ink marks in Palmyra manuscripts, along with its preparation and application methods. This addresses the problems of ink fading and blurring on the surface of Palmyra manuscripts, improves the recognizability of information recorded in the manuscripts, and effectively enhances the stability and durability of the ink marks and pigments after color development while restoring the faded ink marks to their original color.

[0044] The technical solution of this application will be described in detail below through specific embodiments:

[0045] Unless otherwise specified, the technical means used in this invention are conventional means well known to those skilled in the art. All raw materials, reagents, instruments, and equipment used in this invention can be purchased commercially or prepared using existing methods. Unless otherwise specified, all reagents used in this invention are of analytical grade.

[0046] Unless otherwise specified, the technical means used in this invention are conventional methods well known to those skilled in the art. All raw materials, reagents, instruments, and equipment used in this invention can be purchased commercially or prepared using existing methods. The n-butanol used in this invention is analytical grade, and other reagents are also analytical grade unless otherwise specified. The room temperature described in this invention is 25±5 degrees Celsius.

[0047] In this embodiment of the invention, the ethyl cellulose used was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.; the liquid paraffin used was provided by Wuyi Yanwei Medical Technology Co., Ltd. and was of medical grade; and the hydrophobic fumed silica used was provided by Shaoxing Lijie Chemical Co., Ltd. and was model Aerosil R974.

[0048] Example 1;

[0049] 1. Preparation of component A: Aerosil R974 hydrophobic fumed silica dispersion

[0050] Weigh 1.5g of Aerosil R974 hydrophobic fumed silica and add it to a glass bottle with a sealed cap. Then add 20g of n-butanol to the bottle. Use a 100W ultrasonic generator to sonicate the solution at a frequency of 40kHz for 30 minutes to prepare the Aerosil R974 hydrophobic fumed silica dispersion.

[0051] 2. Prepare component B: cellulose mixed solution

[0052] Weigh 8g of ethyl cellulose and 10g of liquid paraffin and add them to a glass bottle with a sealed cap. Then add 60.5g of n-butanol to the bottle. Heat the liquid to 45 degrees Celsius using a magnetic stirrer and stir at 2500 rpm until the ethyl cellulose and liquid paraffin are completely dissolved to prepare a cellulose mixed solution.

[0053] 3. A developer for preparing faded ink stains from the Bayeux manuscript.

[0054] The Aerosil R974 hydrophobic fumed silica dispersion prepared in step 1 and the cellulose mixed solution prepared in step 2 were added to a glass bottle with a sealed cap and mixed. The mixture was ultrasonically treated for 10 minutes using a 100-watt ultrasonic generator with an ultrasonic frequency of 40 kHz to prepare the color developer for the faded ink of the Bayeux manuscript.

[0055] Weigh 25g of the developer for the faded ink from the Bayeux manuscript prepared in step 3 as a sample, observe and record its appearance, such as... Figure 1 As shown in the left image. After being placed at room temperature for one month, its appearance was recorded as follows. Figure 1 As shown in the figure on the right, after one month of storage, the developer of the faded ink from the Bayeux Manuscript remained essentially the same as its initial appearance, with no precipitation or other abnormal changes observed. This result indicates that the developer of the faded ink from the Bayeux Manuscript has excellent dispersion stability and can be stored after preparation.

[0056] Example of results;

[0057] The faded ink from the palm leaf manuscript prepared in Example 1 was tested. The specific experimental methods and test data are shown below:

[0058] Experimental method: Operation process of the actual application of the Bayeux manuscript developer: A layer of the developer prepared in Example 1 was evenly applied to the surface of the faded and blurred ink marks of the Bayeux manuscript and left to stand until the surface was dry.

[0059] Experimental instruments: Dino-Lite AM4115 portable digital microscope, manufactured by Anpeng Technology Co., Ltd.; SW-CJ-IFD ultraviolet light chamber, manufactured by Suzhou Antai Air Technology Co., Ltd.; DHG-9245A electric heating drying oven, manufactured by Shanghai Qixin Scientific Experimental Instrument Co., Ltd.

[0060] Example 1

[0061] Changes in the morphology of faded ink marks in the Bayeux Manuscript before and after using Bayeux Manuscript ink developer:

[0062] Test method: On the same palm leaf manuscript sample, the positions of the ink developer applied and unapplied were photographed and recorded. At the same time, the microscopic morphology before and after color development was observed using a Dino-Lite AM4115 portable digital microscope.

[0063] Results and Discussion: The clarity of the faded ink marks on both the front and back of the Palmyra manuscript was improved and the color of the faded ink marks was enhanced before and after the developer was applied. The color of the Palmyra manuscript itself did not show significant changes. This indicates that the developer for the faded ink marks of the Palmyra manuscript has the effect of improving the blurring and fading of the ink marks, and has minimal impact on the appearance of the Palmyra manuscript itself, allowing the Palmyra manuscript itself to basically maintain its original appearance.

[0064] Example 2

[0065] Changes in grayscale values ​​of faded ink from the Bayeux Manuscript before and after using Bayeux Manuscript ink developer:

[0066] Test method: The faded ink marks on the front and back of the Bayeux manuscript before and after the application of the color developer were photographed and recorded. The gray values ​​of the ink marks before and after color development were compared and analyzed using image processing software. The specific results are shown in Figure 2 and Figure 3.

[0067] Results and Discussion: By Figure 2a , Figure 2b As can be seen, compared with the grayscale value before color development, the overall grayscale value of the faded ink on the front of the Bayeux Manuscript decreased after color development, and the grayscale level of the ink (marked in red in the figure) was even lower. This indicates that the pigment imaging of the faded ink on the front of the Bayeux Manuscript is closer to black after color development, and the color developer has a good color development effect on the faded ink on the front. Figure 3a , Figure 3bAs can be seen, compared with the gray value before color development, the gray value of the faded ink on the reverse side of the Bayeux Manuscript is reduced overall after color development, and the gray level of the ink (marked in red in the figure) is even lower. This indicates that the pigment image of the faded ink on the front side of the Bayeux Manuscript is closer to black after color development, and the color developer has a good color development effect on the faded ink on the reverse side.

[0068] Example 3

[0069] Dry heat aging resistance test of the developer for fading ink stains in Bayeux manuscripts:

[0070] Test method: Refer to DA / T 16-1995 "Durability Test Method for Archival Handwriting Materials". Uncoated and coated samples of faded ink from the Bayeux manuscript were suspended separately in an electric heating drying oven with a certain interval between each sample. The samples were aged in the oven for 72 hours at a temperature of 105±2 degrees Celsius. After the experiment, the samples were removed after the oven temperature had cooled to room temperature and stored in the dark for 24 hours before observation. The microstructure before and after dry heat aging was observed using a Dino-Lite AM4115 portable digital microscope.

[0071] Results and Discussion: After dry heat aging, the ink enhancement effect of the faded ink marks of the Baye manuscript coated with color developer was not affected by high temperature and low humidity. Compared with the undeveloped ink marks, the faded ink marks were still relatively clear, while maintaining the original appearance of the original color of the ink mark and the color of the ink mark.

[0072] Example of effect 4

[0073] UV aging resistance test of the developer for fading ink stains in Bayeux manuscripts:

[0074] Test method: The test was conducted according to DA / T 16-1995 "Durability Test Method for Archival Handwriting Materials". Uncoated and coated samples of faded ink from the Bayeux manuscript were placed in a UV light chamber for 72 hours. The room temperature should be 20±8 degrees Celsius, the UV lamp power should be 40 watts, the wavelength should be 253.7 nm, and the vertical distance between the test sample and the center of the lamp tube should be 120 mm. After 24 hours of protection from light, the samples were removed. The microstructure before and after dry heat aging was observed using a Dino-Lite AM4115 portable digital microscope.

[0075] Results and Discussion: After UV aging, the ink enhancement effect of the faded ink marks of the Baye manuscript coated with color developer was not affected by UV light. Compared with the undeveloped ink marks, the faded ink marks were still clearer, while maintaining the original appearance of the original color and the color of the ink mark.

[0076] In summary, the palm leaf manuscript fading ink developer of the present invention can effectively reveal the original color of faded ink, and has the properties of resistance to dry heat aging and ultraviolet aging. At the same time, it does not change the original appearance of the palm leaf manuscript. The preparation method is simple and the application technology is easy to operate, so that the precious palm leaf manuscript text can be preserved for a long time, and the cultural value of palm leaf manuscripts can be further promoted and inherited.

[0077] Comparative Example 1

[0078] 1. Preparation of component A: Aerosil R974 hydrophobic fumed silica dispersion

[0079] Weigh 0.5g of Aerosil R974 hydrophobic fumed silica and add it to a glass bottle with a sealed cap. Then add 20g of n-butanol to the bottle. Use a 100W ultrasonic generator to sonicate the solution at a frequency of 40kHz for 30 minutes to prepare the Aerosil R974 hydrophobic fumed silica dispersion.

[0080] 2. Prepare component B: cellulose mixed solution

[0081] Weigh 8g of ethyl cellulose and 10g of liquid paraffin and add them to a glass bottle with a sealed cap. Then add 61.5g of n-butanol to the bottle. Heat the liquid to 45 degrees Celsius using a magnetic stirrer and stir at 2500 rpm until the ethyl cellulose and liquid paraffin are completely dissolved to prepare a cellulose mixed solution.

[0082] 3. A developer for preparing faded ink stains from the Bayeux manuscript.

[0083] The Aerosil R974 hydrophobic fumed silica dispersion prepared in step 1 and the cellulose mixed solution prepared in step 2 were added to a glass bottle with a sealed cap and mixed. The mixture was ultrasonically treated for 10 minutes using a 100-watt ultrasonic generator with an ultrasonic frequency of 40 kHz to prepare the color developer for the faded ink of the Bayeux manuscript.

[0084] Results and Discussion: The color developer prepared in this comparative example for the faded ink stains of the Palmyra manuscript showed a certain color development effect. However, compared with Example 1, the color developer for the faded ink stains of the Palmyra manuscript obtained in Comparative Example 1 had a lower content of Aerosil R974 hydrophobic fumed silica, resulting in more obvious reflection after film formation and a generally weak matting effect, which had a greater impact on the expected appearance of the cultural relic after use.

[0085] Comparative Example 2

[0086] 1. Preparation of component A: Aerosil R974 hydrophobic fumed silica dispersion

[0087] Weigh 1.5g of Aerosil R974 hydrophobic fumed silica and add it to a glass bottle with a sealed cap. Then add 20g of n-butanol to the bottle. Use a 100W ultrasonic generator to sonicate the solution at a frequency of 40kHz for 30 minutes to prepare the Aerosil R974 hydrophobic fumed silica dispersion.

[0088] 2. Prepare component B: cellulose mixed solution

[0089] Weigh 2g of ethyl cellulose and 10g of liquid paraffin and add them to a glass bottle with a sealed cap. Then add 66.5g of n-butanol to the bottle. Heat the liquid to 45 degrees Celsius using a magnetic stirrer and stir at 2500 rpm until the ethyl cellulose and liquid paraffin are completely dissolved to prepare a cellulose mixed solution.

[0090] 3. A developer for preparing faded ink stains from the Bayeux manuscript.

[0091] The Aerosil R974 hydrophobic fumed silica dispersion prepared in step 1 and the cellulose mixed solution prepared in step 2 were added to a glass bottle with a sealed cap and mixed. The mixture was ultrasonically treated for 10 minutes using a 100-watt ultrasonic generator with an ultrasonic frequency of 40 kHz to prepare the color developer for the faded ink of the Bayeux manuscript.

[0092] Results and Discussion: The developer of the faded ink stains of the Bayeux manuscript prepared in this comparative example was tested and found to have a developing effect on the faded ink stains of the Bayeux manuscript. However, compared with Example 1, the developer of the faded ink stains of the Bayeux manuscript obtained in Comparative Example 2 had a lower amount of hydrophobically modified cellulose, resulting in a mass ratio of modified cellulose, liquid paraffin and n-butanol of 1:5:33.25. After use, the hydrophobically modified cellulose membrane was prone to breakage and its mechanical properties were slightly insufficient.

[0093] Comparative Example 3

[0094] 1. Preparation of component A: Aerosil R974 hydrophobic fumed silica dispersion

[0095] Weigh 1.5g of Aerosil R974 hydrophobic fumed silica and add it to a glass bottle with a sealed cap. Then add 20g of n-butanol to the bottle. Use a 100W ultrasonic generator to sonicate the solution at a frequency of 40kHz for 30 minutes to prepare the Aerosil R974 hydrophobic fumed silica dispersion.

[0096] 2. Prepare component B: cellulose mixed solution

[0097] Weigh 8g of ethyl cellulose and 2g of liquid paraffin and add them to a glass bottle with a sealed cap. Then add 68.5g of n-butanol to the bottle. Heat the liquid to 45 degrees Celsius using a magnetic stirrer and stir at 2500 rpm until the ethyl cellulose and liquid paraffin are completely dissolved to prepare a cellulose mixed solution.

[0098] 3. A developer for preparing faded ink stains from the Bayeux manuscript.

[0099] The Aerosil R974 hydrophobic fumed silica dispersion prepared in step 1 and the cellulose mixed solution prepared in step 2 were added to a glass bottle with a sealed cap and mixed. The mixture was ultrasonically treated for 10 minutes using a 100-watt ultrasonic generator with an ultrasonic frequency of 40 kHz to prepare the color developer for the faded ink of the Bayeux manuscript.

[0100] Results and Discussion: The color developer for the faded ink marks of the Palmyra manuscript prepared in this comparative example showed a weak color development effect on the ink marks on the surface of the Palmyra manuscript. Compared with Example 1, the color developer for the faded ink marks of the Palmyra manuscript obtained in Comparative Example 3 used a lower content of liquid paraffin (the mass ratio of modified cellulose to liquid paraffin was 1:0.25). After use, it was not effective in filling the air layer between "ink marks" and between "ink marks and Palmyra components", and could not eliminate internal light scattering to the greatest extent, resulting in an insignificant color development effect.

[0101] Comparative Example 4

[0102] The fixing agent was prepared according to the formulation of Example 1 described in the prior art CN117025030A, and its color development effect on the faded ink marks of the Bayeux manuscript was tested using the same test method as in Effect Example 1.

[0103] Test method: On the same palm leaf manuscript sample, photographs were taken to record the locations of the applied and unapplied palm leaf manuscript fading ink developer.

[0104] Results and Discussion: The fixing agent prepared by CN117025030A had no color development effect on the faded ink marks and could not achieve the effect of re-developing the faded ink marks.

[0105] Comparative Example 5

[0106] The liquid paraffin in Example 1 was replaced with an equal amount of natural castor oil (the effective component of the color-fixing agent in CN117025030A scheme), and the remaining raw materials, dosages, preparation methods and testing methods were completely consistent with those in Example 1.

[0107] Results and Discussion: The color developer prepared in this comparative example for the faded ink marks of the Bayeux Manuscript had no color development effect on the faded ink marks, and the yellow castor oil also significantly affected the appearance color of the Bayeux Manuscript.

[0108] Comparative Example 6

[0109] Component B, prepared in Example 1, was used alone as a colorimetric agent to verify its colorimetric effect. The specific raw materials, dosages, preparation methods, and testing methods were completely consistent with those in Example 1.

[0110] Results and Discussion: The color developer prepared in this comparative example for the faded ink marks of the Bayeux Manuscript did not show significant color development effect on the faded ink marks. This indicates that component A, made of hydrophobic fumed silica, and component B, made of liquid paraffin and hydrophobically modified cellulose, provided in this invention have a significant synergistic effect. Only when the two components are combined and applied to the faded ink marks on the surface of the Bayeux Manuscript can a significant effect of enhancing color and improving clarity be achieved.

[0111] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A color developing agent for faded ink of a beibei manuscript, characterized in that, The component A comprises hydrophobic fumed silica and n-butanol; The component A comprises hydrophobic fumed silica and n-butanol; The component B comprises hydrophobically modified cellulose, liquid paraffin and n-butanol; The component A and the component B are mixed to obtain a color developing agent for reappearing faded ink on the surface of a parchment manuscript; The mass ratio of the hydrophobic fumed silica and the n-butanol in the component A is 1: (5-35); The mass ratio of the hydrophobically modified cellulose, the liquid paraffin and the n-butanol in the component B is 1: (0.5-4): (5-30).

2. The color developing agent for faded writing in a manuscript according to claim 1, wherein The mass ratio of the component A and the component B is 1: (1-5).

3. The color developing agent for faded writing of a manuscript according to claim 1, wherein The hydrophobic fumed silica comprises one or more of Aerosil R812S hydrophobic fumed silica, Aerosil R972 hydrophobic fumed silica and Aerosil R974 hydrophobic fumed silica.

4. The color developing agent for faded writing in the manuscript according to claim 1, wherein The hydrophobically modified cellulose comprises one or both of cellulose acetate and ethyl cellulose; The liquid paraffin is in a liquid state at 0-50℃.

5. The preparation method of the manuscript fading ink color developing agent according to any one of claims 1 to 4, characterized in that, The method comprises the following steps: Preparation of the component A: the raw materials are accurately weighed according to the proportion, the hydrophobic fumed silica is added to the n-butanol, and the mixture is uniformly dispersed by ultrasonic to obtain a hydrophobic fumed silica dispersion liquid; Preparation of the component B: the raw materials are accurately weighed according to the proportion, the hydrophobically modified cellulose, the liquid paraffin and the n-butanol are mixed, and the mixture is stirred by vortex until the hydrophobically modified cellulose is completely dissolved to obtain a cellulose mixed solution; The component A and the component B are mixed according to the proportion, and the mixture is uniformly dispersed by ultrasonic to obtain the color developing agent for faded ink on a parchment manuscript.

6. The method for preparing the color developing agent for faded ink on a parchment manuscript according to claim 5, wherein the ultrasonic dispersion condition is ultrasonic treatment at 20-60 kHz for 5-30 minutes; and the vortex stirring condition is stirring at a speed of 1000-2500 rpm for 20-60 minutes. The method comprises the following steps: The color developing agent for faded ink on a parchment manuscript is uniformly applied to the area of the faded ink on the surface of the parchment manuscript, and the manuscript is left to stand and dry.

7. The method of using the manuscript fade ink revealer according to any one of claims 1 to 4, wherein, ​ ​

Images