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Fineness of Grind Gauge, Hegman Type
We manufacture the Fineness of Grind Gauge, Hegman Type in Ambala Cantt for materials testing teaching and testing laboratories, and supply it worldwide against institutional and tender orders. See the full Oil, Petroleum & Paint Testing range.
Measures the dispersion of pigment in a liquid coating by drawing the sample down a precision tapered groove and reading where agglomerates appear.
Parameter: Value
Ranges: 0 to 25, 0 to 50, 0 to 100 and 0 to 150 um
Scales: Micron and Hegman, dual marked
Grooves: Single or twin groove
Material: Hardened stainless steel, lapped and ground
Scraper: Hardened steel, double-edged
Supplied with: Gauge, scraper, case, certificate of groove depth
Poor pigment dispersion shows up as reduced gloss, weak colour strength, poor hiding power and specks in the final film — but only after the batch is made.
The grind gauge catches it during manufacture, in under a minute.
The gauge is a hardened steel block with a groove machined from a defined depth down to zero.
Sample is placed at the deep end and drawn down with a scraper.
Where the groove depth falls below the size of the largest agglomerates, the particles break the film surface and a visible speckled pattern appears.
The reading at that point is the fineness of grind, expressed in microns or on the Hegman scale.
Standards: ASTM D1210, ISO 1524, BS 3900-C6
fineness of grind gauge, hegman gauge, grindometer, pigment dispersion gauge, ASTM D1210 India
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