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Cultural relic surface lead white return-lead cleaning liquid

A technology for removing liquid and returning lead, which is applied in the direction of inorganic compound addition, coating, post-treatment of waste paper, etc. It can solve the problems of easy diffusion and difficult removal, embrittlement and hardening of paper, and accelerated paper aging, so as to eliminate lead white return Effect of lead phenomenon, enhancement of mechanical properties, and improvement of weather resistance

Active Publication Date: 2017-10-24
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Cultural relic surface lead white return-lead cleaning liquid
  • Cultural relic surface lead white return-lead cleaning liquid
  • Cultural relic surface lead white return-lead cleaning liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve 0.4g of hydroxypropyl methylcellulose in 100mL of deionized water, then add 0.4g of nano-calcium peroxide, and disperse ultrasonically at room temperature for 30 minutes to prepare a lead-back removal solution.

Embodiment 2

[0027] Dissolve 0.4g of hydroxypropyl methylcellulose in 100mL of deionized water, then add 0.6g of nano-calcium peroxide, and disperse ultrasonically at room temperature for 30 minutes to prepare a lead-back removal solution.

Embodiment 3

[0029] Dissolve 0.6g of hydroxypropyl methylcellulose in 100mL of deionized water, then add 1.0g of nano-calcium peroxide, and disperse ultrasonically at room temperature for 30 minutes 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 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/18D21H19/12D21H17/25D21H17/67
Inventor 胡道道凡晓宇梁兴唐李世荣侯诗
Owner SHAANXI NORMAL UNIV
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