Ultramarine Blue (A219)

ACMI Tox Rating: AP
CI Name: PB29
Chemical Description: Complex Silicate of Sodium and Aluminum with Sulfur
Lightfast Rating: I
STA/SED: -

Description: Consistent color for an economic price. 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