The reasons for the discoloration of the paint may be as follows: 1. The ester solvent in the varnish turns black with the iron container after it encounters water.
2, turpentine is easy to generate red brown pigment in the iron barrel.
3, gold and silver powder and varnish prone to acid etching, so that the paint color becomes green, dark, lose luster.
4, the storage period is too long, precipitation discoloration.
The methods of prevention and control are as follows: 1. For shellac varnish, which is most susceptible to discoloration, and is packed in non-metallic containers.
2. Add gold powder and silver powder before using varnish. Do not store it in varnish prematurely.
3, the precipitation of discoloration of the paint, if not a quality problem, can also be used after sufficient stirring.
Keywords: Home decoration construction supervision
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