M E L A N T E R I T E - F e S 0 4 - 7 H 2 0 , ferrous sulphate. Below: natural specimen from Cerro Potosi. Bolivia, shown in .4:1 scale, is ocher-tinged white. Left: Synthetic crystals specimen, from Pfizer laboratory in Easton, Pa., shown in .8:1 scale and actual color.
Pfizer Research Will Back-Stop Your Own R & D New dimensions in color engineering have become possible with the wide range of pure iron oxide pigments that now can be produced from melanterite. In its natural state, this mineral usually contains many impurities, and no known substantial deposits remain. Pfizer research overcame these problems by developing synthetic melanterite—in purities of up to 99.5% — from raw materials in abundant supply. The resultant pigments are remarkable for chemical stability, color permanence, particle size uniformity, dispersion and suspension qualities. Advantageous applications for them exist throughout the paint and paper, rubber and plastic, ceramic and cosmetic industries. Pfizer scientists and laboratories stand ready to help determine exactly how these and other Pfizer pigmentsextender as well as color—may improve your products and reduce their cost. Please send for our brochure CMC-70, and request technical reports on the pigments of concern to you.
MINERALS, PIGMENTS G METALS D I V I S I O N
Pfizer^
Dept. OCX3 · 235 East 42nd S i r · · ! , N«w York, N.Y. 10017
