Paints and varnishes are used to protect metals, timber or plastered surfaces from the corrosive effects of weather, heat, moisuture or gases etc. and also to improve their appearance.
Paints in common use are classified as oil paints, water paints, cement paints and bituminous paints. There are some “special paints” used for special purposes e.g. heat resisting or fireproof paints, chlorinated rubber paints (for protection against acid fumes etc.) luminous paints (for visibility of painted surfaces in the dark) etc., etc.
Varnish is solution of resin in either oil of turpentine or alcohol. It dries after applying leaving a hard, transparent and a glossy film of resin over the varnished surface.
Varnish is applied : (i) to the painted surface to increase its brilliance and to protect it from the atmospheric action, (ii) to the unpainted wooden surface with a view to brighten the ornamental appearance of the grains of wood.
|10.||PAINTS AND VARNISHES|
|10.3||Composition of Oil Paints|
|10.4||Characteristics of a Good Paint|
|10.5||Preparation of Oil Paints|
|10.6||Removal of Old Paint|
|10.8||Painting of New Wood Work|
|10.9||Repainting Wood Work|
|10.10||Painting Plastered Surface|
|10.11||Painting Iron or Steel Work|
|10.12||Defects in Painting|
|10.21||French Polish or Spirit Varnish|
|10.24||Co lour Wash|