1) Cowles dispersion test is carried out referring to the procedures from ASTM:
A) Add the pigment into alkyd resin (70% solid)
B) Stir at high speed to mix them thoroughly
C) Then measure the degree of dispersion (commonly referred to as "fineness of grind") with a Hegman gauge
D) This is a key index reflecting the pigment's dispersion
2) Light fastness is evaluated in 8 grades, grades 1 to 8 represents poor to the best
3) Applications: Widely used in the industries of painting, printing ink, rubber, plastic and stationery
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