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Adhesives, Paints, and Varnishes: Ingredients
Paints - Other Ingredients. - Besides linseed oil, for finer kinds of work, as the preparation of artist's colors, other oils, as nut and poppy oils, are sometimes used.
Miscellaneous Ingredients. - Soluole glass, naphthas, tars, lime, and various other materials are sometimes employed for cheap paints or for special purposes. Poisonous substances are sometimes mixed with the paint used about salt water to prevent marine plants and animals from fastening to painted surfaces, and phosphorus is sometimes added when a luminous paint is desired.
USES OF PAINT Quantity of Paint to Use. To estimate the quantity of paint required, divide the number of square feet of surface by 200. The quotient is the number of gallons of paint required to give two coats.
Or divide the number of square feet of surface by 18. The quotient is the number of pounds of pure ground white lead required to give three coats.
Another rule is that new woodwork requires about 1 pound of paint to the square yard for three coats.
But the rules vary according to the nature of the surface and its condition, the temperature, and the like. Old woodwork, especially if unpainted or if the paint has been allowed to wear off, will absorb more paint than new wood. Some kinds of wood take more paint than others, and surfaces of stone, brick, or metal may take less than wood.