Paint is made by mixing colored pigment powder in a liquid vehicle that contains one or more resins and a solvent. The pigment and vehicle are made into a fine paste by the tumbling action of balls or pebbles in a ball mill. During let down, the paste is pumped from the mill and strained. In a holding tank, the color is adjusted by adding shading pastes, and the mixture is thinned with solvent. After final testing, the paint is filtered and poured into containers for shipment.
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World Book illustration by Arthur Grebetz</P>
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