Paint is a liquid pigment that, after applied to a solid material and allowed to dry, adds a film-like layer, in most cases to create an image, known as a painting. Ans2Therefore, a binder is needed to hold the pigment particles together and adhere them to the surface. A solvent is needed to dissolve or dilute the binder. For aqueous binders, water is the solvent; for oils, resins or waxes, non-aqueous solvents such as turpentine oil are necessary.