what is varnish
Varnish is traditionally a combination of a drying oil, a resin, and a thinner or solvent.Varnish finishes are usually glossy but may be designed to produce satin or semi-gloss sheens by the addition of flatting agents.Varnish has little or no color, is transparent, and has no added pigment, as opposed to paints or wood stains, which contain pigment and generally range from opaque to translucent.olyurethane varnish may also lack the hand-rubbed lustre of drying oils such as linseed or tung oil; in contrast, however, it is capable of a much faster and higher build of film, accomplishing in two coats what may require multiple applications of oil.