Cowles Dispersion Test is carried
out referring to the procedure from ASTM, i.e., add the pigment
into alkyd resin(*0% solid), stir at high speed to mix them
thoroughly, then measure the degree of dispersion (commonly
referred to as "fineness of grind") with a Hegman Gauage. This is a
key index reflecting the pigment's dispersion.
(2)
Light fastness is evaluated in 8
grades, grades 1 8 represent poor to the best.
Uses:widely used in
the industries of painting, printing ink , rubber, plastic and
stationery etc.
