Varnish glossiness performance

In the paint construction, the varnish regains its original brightness (gloss) after being polished, which is called the "reflective" property of the varnish. (Related instrument: gloss meter)

The restoration of gloss may be global (over the entire surface) or partial (the surface remains largely matte and the gloss is restored only in individual parts of the surface), and in both cases this should be considered Varnish is substandard.

If after polishing, the gloss does not change at all within the time limit specified in the technical conditions, the varnish can be considered qualified.

The point of varnish (or enamel) to restore the gloss properties is dry. When removing the next layer of varnish, the paint layer will be more solid if applied to a matte surface than to a glossy surface, because the result of beating is that many Hardly visible scratches are deposited on the varnish surface, and the next layer of varnish (or enamel) can penetrate into the scratches. The result of one layer of varnish penetrating into another layer of varnish strengthens its mutual cohesion.

The reason why the polished varnish regains its luster has not been clarified recently. The "reflective" performance of the varnish may be due to the excessive oil content in the paint and the lack of resin. Result of premature sanding on varnish.

For example, No. 1 and No. 4 oil-based varnishes should not regain their gloss within 24 hours after sanding.