Preventing discoloration in paints

The new brush's door color is deeper than the paint itself. Is the paint discolored? The discoloration of paint mainly refers to the discoloration of varnish. The varnish was originally a clear, colorless or very light yellow color, which turned brown or black after discoloration. The color paint also has the phenomenon of discoloration, which is mainly manifested in the darker color of the paint.

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.

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