Norme ASTM D1199-86R03
1.1 This specification covers two types of high-content calcium carbonate pigments, as follows:
1.1.1 Type PC—Calcium carbonate precipitate, prepared either by complete solution or by carbonation of lime.
1.1.2 Type GC—Ground mineral product.
1.2 Six grades of pigments, based on particle size (see ) are covered.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.