Ultramarine Blue (C219)

ACMI Tox Rating: CL
CI Name: PB29, PBk9, PV23
Chemical Description: Complex Silicate of Sodium and Aluminum with Sulfur, Carbazole Dioxazine, Amorphous Carbon produced by charring Animal Bones
Lightfast Rating: I
Opacity: T

Description: Originally from the lapis lazuli stone, this vibrant blue is an essential of any artist's palette. A deep blue with a purple undertone, it can be mixed extensively to produce clean secondary and tertiary colors. It is a staple for shadows, portraits, landscapes, and seascapes.

reference: www.grumbacherart.com