Coffee Laboratory HAND SCREENS are quality constructed, using premium kiln dried wood, utilizing mortise and tenon joinery.
The finished wooden frames are designed to stack on top of each other.
Round hole apertures are custom punched with .004" tolorences, in the metal plate, using computer numerical control (CNC) machine tools.
Labels are clearly marked in 64th" increments for agricultural grading applications, including coffee beans.
012WPP SERIES WOODEN HAND SCREENS
Although the millimeter equivelants on this popular chart, aren't exact, it fortunately doesn't have any real impact on the size analysis.
The New York Grading Chart has exact conversions, but both result in the same distribution because the tolerences are too small to impact 64th inch seperations.
COFFEE BEAN SIZE GRADING SIEVES
Bean Sizing Sieves are used to separate the coffee beans by 64th of an inch increments, starting with 8/64ths, all the way up to 20/64ths of an inch, or more. Different countries use somewhat different size classifications, and there are different methods available for green coffee grading. The SCAA METHOD and the BRAZILLIAN / NEW YORK Method are both in practice today. (SEE FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS) for more information.
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