The manufacture of mineral and lake pigments, containing directions for the manufacture of all artificial artists' and painters' colours, enamel colours, soot and metallic pigments (1901)
it is quite uniform. This form of mill can be made in different sizes. Fig. 42 shows the construction of a form for grinding by hand. The actual grinding arrangements are exactly the same as those previously described ; the difference lies simply in the use of a fly-wheel turned by a handle. The… … FIG. 42. between smooth rollers moving in opposite directions with different speeds, which thus exert a grinding action in addition to the crushing effect. The two rollers are provided with cog-wheels with a different number of cogs in order to give the different speeds. In order that the paint may…
Pigments · Dyes and dyeing
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