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Home >>Professional Decorating>>Decorating Museum>>Saddening, Sinking-in, Sleepiness
Decorating Defects - their cause and cure
"Saddening", "Sinking-in", "Sleepiness"
These terms are variously applied to describe loss of gloss and minute disintegration of a glossy paint, varnish, or enamel.
The defect is usually attributable to excessive porosity in the ground coat, causing undue absorption of the vehicle from the finish, yet it can also occur on one applied over a definitely non-porous surface.
In some cases it is due to uneven application or to putting on too thick a coat, and in many instances, where it takes place almost at once after the material has dried, a further application, brushed on more thinly and evenly, will give a perfect result.
The use of over-stout materials, or finishes applied in too thick a coat, should, in consequence, be avoided. The paint coat oxidises on the surface and forms a solid film, beneath which is material which is only semisolid; the latter takes a long time to harden right through and the changes which occur in the process distort the already formed surface skin.