Learn : Characteristics of a good paint,Paints, Paints Classification
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Characteristics of a good paint
Paints are used to protect metals, timber or plastered surfaces from the corrosive effects of weather, heat, moisture 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.
Following are the Characteristics of a good paint:
(i) It should have a good body or spreading power.
(ii) It should work smoothly and freely and be capable of being laid in a thin coat with the brush.
(iii) It should form durable, tough and resistant to wear film on drying.
(iv) Colour of paint should not fade or change.
(v) It should become surface dry in about 9 hours and hard enough to take up another coat in 24 hours.
(vi) It should not crack on drying.
(vii) It should give a smooth and pleasing appearance showing no brush marks on drying.
(viii) It should dry quickly.
(ix) It should not damage the painted surface.