Paints and Varnishes

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 and Varnishes

Paints and varnishes
Paints and varnishes

CLASSIFICATION

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

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.

Learn

10. PAINTS AND VARNISHES
10.1 General
10.2 Classification
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
10.7 Painting
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
10.13 Enamel Paints
10.14 Lacquer
10.15 Fireproof Paint
10.16 Cellulose Paints
10.17 Alluminium Paints
10.18 Zinc Paint
10.19 Distempers
10.20 Varnish
10.21 French Polish or Spirit Varnish
10.22 Wax Polish
10.23 White Washing
10.24 Co lour Wash
Repainting Doors

Repainting wood work

Learn : Repainting wood work,Repainting Wood Furniture,Repainting Doors,Repainting Cabinetry,wood floors Repainting wood work (i)        If the old paint be unsightly, unsound, blistering or flaking off then it should be removed by the application of some paint remover, by scrapping or by burning the paint with a blow lamp. (ii)       On surface disfigured by smoke a coat …

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New plastered surfaces

Painting plastered surfaces

Learn : Painting plastered surfaces,New plastered surfaces Painting plastered surfaces (i)        A plastered surface should be painted only after it has thoroughly dried, otherwise the paint would get spoil. (ii)       To avoid sucking of paint by plaster soak the surface with a pore filling solution which will dry off leaving an impervious surface. A wash …

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Painting new wood work

Painting new wood work

Learn : Painting new wood work : Knotting or killing the knot, Application of priming coat, Stopping, Application of finishing coats. Painting new wood work   Following points should be attended to before painting new wood work:   (i)        Only well seasoned timber should be painted otherwise not only shall the paint be spoilt but …

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Removal of old paint and painting

Removal of old paint and painting

Learn : Removal of old paint and painting : Remove the paint, old paint and painting Removal of old paint and painting REMOVAL OF OLD PAINT One of the following two methods could be employed to remove old paint from a surface : (i)        Burning the paint by directing the flame of a blow lamp on …

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Preparation of oil paints

Preparation of oil paints

Learn :Preparation of oil paints Learn : Composition of oil paint PREPARATION OF OIL PAINTS. To get started making oil paint, you’ll need: 1) Cold-pressed, raw, or unrefined linseed oil – Linseed oil tends to do much of the heavy lifting in many oil based paint formulations. The reason is that unlike most plant based …

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Characteristics of a good paint

Learn : Characteristics of a good paint,Paints, Paints Classification Characteristics of a good paint Paints 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 Classification Paints in common use are classified as oil paints, water paints, cement …

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Composition of oil paints : Base,Vehicle,Drier,Colouring pigment,Thinner

Composition of oil paints

Learn :Composition of oil paints: Base: White lead, Red lead, Zinc oxide (or zinc white), Iron Oxide, and metallic powders such as Aluminum, Copper and Bronze etc. are the commonly used bases,Vehicle: Oils most commonly used as vehicles are : Linseed oil, Poppy oil. Nut oil and Tung oil. Colouring pigments,Solvent or thinner,Drier,Inert filler Composition of …

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