A kind of liquid for removing lead white and returning lead on the surface of cultural relics
A technology for removing liquid and returning lead, applied in the directions of adding inorganic compounds, adding material mixtures, adding non-fibrous pulp, etc., can solve the problems of accelerated paper aging, easy diffusion and difficult removal, paper embrittlement and hardening, etc., to improve weather resistance. , Eliminate the phenomenon of lead white and lead back, and enhance the effect of mechanical properties
Active Publication Date: 2019-10-25
SHAANXI NORMAL UNIV
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- Application Information
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Problems solved by technology
However, hydrogen peroxide has strong oxidizing properties, and it will accelerate the aging of fibers in paper cultural relics when processed
Excessive hydrogen peroxide is easy to diffuse on paper cultural relics and is not easy to remove, causing unnecessary damage to surrounding pigments, and its residue in cultural relics will make paper brittle and hard, and accelerate paper aging
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0025] Dissolve 0.4 g of hydroxypropyl methylcellulose in 100 mL of deionized water, then add 0.4 g of nanometer calcium peroxide, and ultrasonically disperse for 30 minutes at room temperature to prepare a lead-back removal solution.
Embodiment 2
[0027] Dissolve 0.4 g of hydroxypropyl methylcellulose in 100 mL of deionized water, then add 0.6 g of nano-calcium peroxide, and ultrasonically disperse for 30 minutes at room temperature to prepare a lead-back removal solution.
Embodiment 3
[0029] Dissolve 0.6 g of hydroxypropyl methylcellulose in 100 mL of deionized water, then add 1.0 g of nano-calcium peroxide, and ultrasonically disperse for 30 minutes at room temperature to prepare a lead-back removal solution.
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Abstract
The invention discloses a cultural relic surface lead white return-lead cleaning liquid which is a uniform and stable dispersion composed of, by mass, 2-6 parts of hydroxypropyl methyl cellulose, 2-16 parts of nano calcium peroxide and 1000 parts of deionized water. The nano calcium peroxide can effectively remove black return lead on the surfaces of cultural relics and neutralize acidic substances in the cultural relics without having impact on patterns and color of the cultural relics; the hydroxypropyl methyl cellulose serving as a stabilizer can stably disperse the nano calcium peroxide and play a role in reinforcing paper cultural relics. The return-lead cleaning liquid can effectively remove lead white return-lead on the surfaces of the cultural relics, neutralize the acidic substances in the cultural relics and improve mechanical performance and weatherability of the paper cultural relics, so that the return-lead cleaning liquid can be used for cleaning and restoring the cultural relics.
Description
Technical field [0001] The invention belongs to the technical field of cultural relics protection, and specifically relates to a liquid for removing lead from the surface of cultural relics, specifically a method for removing lead from cultural relics by using hydroxypropyl methylcellulose to stabilize nano-calcium peroxide. Background technique [0002] Lead white (basic lead carbonate) has the characteristics of small particle size and easy suspension. It has been used by ancients as a white paint in the creation of cultural relics. However, over time, lead white will react with hydrogen sulfide in the air, sulfur-containing pigments near lead white, such as orpiment (arsenic trisulfide), and sulfur-containing amino acids produced by the metabolism of certain molds. During these degradation processes, a lot of lead white The pigment produces a black substance, lead sulfide, which turns black seriously. When lead white is mixed with other color pigments to paint human skin colo...
Claims
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IPC IPC(8): D21H25/18D21H19/12D21H17/25D21H17/67
CPCD21H17/25D21H17/67D21H17/74D21H19/12D21H25/18
Inventor 胡道道凡晓宇梁兴唐李世荣侯诗
Owner SHAANXI NORMAL UNIV