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.
