ASTM D1199-86(1999)

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 3.3) are covered.