Looking for Zinc oxide shall be a dry pigment grade powder free of agglomerates and made
using the French process.
The average particle size shall be in in the range of 0.1 to 0.7 microns using a laser
particle size analyzer or equivalent method.
99 % of this powder shall be less than 325 mesh( 45 microns)
Sulfur 0.1% max
Max lead 0.1%
Max Cadmium 0.1%
Max volatiles 0.3% (testing at 110 deg C to constant weight loss)
The powder shall be free of foreign material and packaged in bags of weight 50
pounds or less.
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