Webbing
Fine strands of dry paint in the atmosphere during spraying mainly chlorinated rubber based paints.
Wet and Dry
Carborundum abrasive paper which can be used either dry or wetted with water or thinner, (see Emery Cloth).
Wet and Dry Abrasive Paper
Based on Silicone carbide grit onto waterproof backing and when used wet the water acts as a lubricant which prevent the grit surface from glogging.
Wet Edge
The edge-boundary of the wet coating which remains workable, particularly on large surfaces.
Wet Edge Time
The time a wet coating remains open at the edges allowing freshly-applied material to join up without showing any laps, (see Lap Time).
Wet Film Thickness Gauge
Wet Film Thickness Gauge
Wet film thickness gauges are used when a specific dry or wet film thickness are recommended/specified.
To calculate a required dry film thickness (d.f.t) from a wet film thickness (w.f.t) it is necessary to know the volume solids content of the paint coating.
The solids content can be obtained from the products technical data sheet.
Calculation formula for a dry film thickness from the wet film thickness d.f.t.=w.f.t. X % volume solids ÷ 100
To measure the wet film thickness required : w.f.t.=d.f.t. X 100 ÷ % volume solids.