11 сентября, 2015 
Pokraskin fineness of grind The grind gauge (grindometer) consists of a steel block with a groove. The depth of the groove at one end is approximately twice the diameter of the largest pigment particle, and decreases continuously to zero at the other end. The sample is placed at the deep end of the groove and drawn to the other end with a scraper. The depth at which a large number of particles become visible as pinholes or scratches on the surface of the pigment-binder system is read off from a scale graduated in micrometers. For standards, see Table 1.1 (“Fineness of grind”). Apparatus: Hegman’s grindometer gauge (block and scraper).
1.5.2.2
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