Phthalo Blue Red Shade Series 2 - Pigment Color Index name PB15:1. All Phthalo pigments have and extremely high tinting strength. In mass tone they are extremely dark in value often overlooked on the shelf since they appear black. They are also transparent in nature. Therefore they are an excellent choice for extending with wax medium for glazing. When used for mixing other colors only a small amount is needed. Phthalo Blue Red Shade is a good choice for mixing purples especially when mixed with Alizarin Crimson or Quinacridone Red. Hot Cakes are ready-to-use encaustic paints sold in convenient reusable metal tins. Hot Cakes are made from artist grade pigments damar resin and United States Pharmaceutical Grade (USP) refined natural beeswax. Our high-tech mills are capable of shearing pigment to their smallest particle size which enables us to manufacture a paint that is richer creamier cleaner and more vibrant than ever before possible!