A device used to measure the fineness-of-grind of the particles of pigment in a printing ink, consisting of two metal troughs with numerical marks ranging from zero to the maximum depth of the trough. The ink samples to be tested are placed in the troughs and drawn toward the zero mark by a highly-polished scraper blade, and the point at which pigment particles begin to scratch the metal surface of the scraper blade (or ink flow is interrupted) is the measure of the fineness-of-grind. (See Fineness-of-Grind.) A grindometer is also called a grind gauge.

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