Grumbacher Academy Oil Paint, 150 ml/5.07 oz, Zinc White A clean, slow drying white ideal for alla prima painting. It's less opaque than Titanium White, which makes it an attractive alternative for mixing tints when subtle shifts are desired. Its transparency also makes it ideal for glazing and scumbling. Zinc White has a tendency to yellow slightly over time when used straight from the tube, but does not do so in mixes. Color is made with finely ground pigment and has an ASTM lightfast rating of 1-Excellent; Made in USA Smooth, rich paint is highly pigmented and has superior tinting strength at a single student price The non-metallic colors in the Academy Oil student line correlate to the Pre-tested professional line, allowing students to graduate to a professional grade paint with ease