Sheen is the amount of shine a paint has once it is completely dry. Flat, eggshell, satin, semi-gloss, and high gloss are common sheens of latex paint.
Pigment, along with binder, solvent, and other additives are the main ingredients of paint. Pigment is the component that gives paint its color and opacity. The pigments used in paint are normally present as fine solid particles that are dispersed, but not soluble, in the binder and solvent.
Walls must be primed before applying the finish coat of paint when the surface hasn't ever been painted, when going from a dark color to a light color or when the surface is stained with nicotine, crayon, ink, or has lots of scuff marks.
To assure maximum washability and durability, wait at least two weeks before washing the dry paint film. Avoid any abrasive or harsh chemical cleaners as these could damage the paint film.
For most interior painting and exterior painting jobs with standard latex paint, the surface is dry to the touch within an hour. Paint can take several days to fully dry, but won’t rub off if you brush against it.
Semi-gloss and high gloss paint can reveal small nicks and bumps. If you have minor imperfections on your wall surface, you may want to use flat or satin finish paint so they will be less noticeable.