Calcium sulfate is an economical Ti02 extender.Recent independent tests reportedly confirm that anhydrous an·hy·drous adj. Without water, especially water of crystallization. anhydrous (anhī´drus), adj without water. anhydrous containing no water. calcium sulfate (gypsum gypsum (jĭp`səm), mineral composed of calcium sulfate (calcium, sulfur, and oxygen) with two molecules of water, CaSO4·2H2O. It is the most common sulfate mineral, occurring in many places in a variety of forms. ) is an economical TiO2 extender See Media Center Extender, bus extender and DOS extender. that maintains good pigmenting performance in PP. Grade CAS-20-4 from U.S. Gypsum Co.'s Specialty Products Div., Chicago, has been used by makers of color concentrates to reduce manufacturing costs without sacrificing quality. Conducted by specialty minerals producer and distributor Kish Co. Inc. of Mentor, Ohio, the tests demonstrated that L,a,b and opacity Refers to being "opaque," which means to prevent light from shining through. For example, in an image editing program, the opacity level for some function might range from completely transparent (0) to completely opaque (100). values were essentially unchanged at TiO2 substitution levels between 10% and 25%. CAS-20-4 is an extremely white, fine-particle filler made from high-purity gypsum rock. "Its brightness, narrow particle-size distribution, and non-abrasive properties make it an ideal TiO2 extender," says Susan Dichter, business manager for USG's Specialty Products Div. Tel: (3121606-4523 * PT Direct: 368UP |
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