eliminated. And, third, the paint must be brought to itsproper application temperature.MIXINGPaints should be mixed, or blended, in the paintshop just before they are issued. Mixing proceduresvary among different types of paints. Regardless of theprocedure used, try not to overmix; this introduces toomuch air into the mixture. Table 8-3 outlines the typesof equipment and remarks for various coatings.Mixing is done by either a manual or mechanicalmethod. The latter is definitely preferred to ensuremaximum uniformity. Manual mixing is less efficientthan mechanical in terms of time, effort, and results.It should be done only when absolutely necessary andbe limited to containers no larger than 1 gallon.Nevertheless, it is possible to mix 1-gallon and5-gallon containers by hand. To do so, first pour halfof the paint vehicle into a clean, empty container. Stirthe paint pigment that has settled to the bottom of thecontainer into the remaining paint vehicle. Continueto stir the paint as you return the other half slowly toits original container. Stir and pour the paint from canto can. This process of mixing is called boxing paint.The mixed paint must have a completely blendedappearance with no evidence of varicolored swirls atthe top. Neither should there be lumps of undispersedsolids or foreign matter. Figure 8-1 illustrates the basicsteps for boxing paint.There are only three primary true-pigmentedcolors: red, blue, and yellow. Shades, tints, and huesare derived by mixing these colors in variousproportions. Figure 8-2 shows a color triangle withone primary color at each of its points. The letteringFigure 8-2.—A color triangle.Figure 8-1.—Manual mixing and boxing.8-9
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