Rather than testing dry pigment, it is more likely that a pigment sample would be made into a paste and tested for fineness of grind
(D1210) and the ability to tint a white or neutral base.
"With sorghum, the quality, nutrient content and the fineness of grind
should be closely monitored.
AOAC Method 992.23 indicates that the suitable fineness of grind
must be determined (for each different material analyzed) to achieve the precision that gives RSD (equal or less) of 2% for ten successive determinations of nitrogen.
Program the number of cups and fineness of grind
. No need to transfer ground beans to a filter--the machine does it for you." Following the instructions, highlight the machine's features, which may include programmable brewing, a pause-and-serve function, or an automatic shutoff.
The industry's understanding of expert control and its potential value has grown significantly over the past decade and many operations around the world today have incorporated such systems in their designs with obvious success - average power draws in tertiary crushing plants, for example, can be increased by up to 40%, throughputs in single stage ball milling and SAG circuits have improved by 4-8%, whilst in ball mill circuits, where fineness of grind
is more desirable than higher throughput, up to a 3% reduction in final grind size can be achieved, without a reduction in tonnage throughput.
Company's color paste concentrates are laboratory-controlled to ensure uniformity of color, dispersion, viscosity, and fineness of grind
There are standard tests for fineness of grind
and tint strength, but I prefer to use a light microscope.
A flocculated paint usually gives a lower Hegman number (fineness of grind
), but the shearing action of the drawdown may break up the clumps.