www.pcimag.com/articles/92010-pigments-offer-a-new-family-of-colorants-based-on-diffractive-effects

Pigment

February 1, 2011

Holliday Pigments: Ultramarine TR achieves the highest-strength blue with the highest transparency. Careful control of the particle size, particle size distribution and ultramarine chemistry enables these distinct effects to be achieved, while retaining superior performance.