Cultural relic surface lead white return-lead cleaning liquid

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 in particular relates to a liquid for removing lead whitening on the surface of cultural relics, in particular to a method for using hydroxypropyl methylcellulose to stabilize nanometer calcium peroxide to remove the phenomenon of lead returning to cultural relics. Background technique [0002] Lead white (basic lead carbonate) has the characteristics of small particle size and easy suspension. It has been used as white paint by the ancients in the creation of cultural relics and paintings. 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 some molds. During these degradation processes, many lead whites The pigment produces a black substance, lead sulfide, which darkens severely. When lead white is mixed...

AI Technical Summary

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

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