These crayons are formulated to achieve vibrant coloring effects on porous surfaces for mixed media. Ideal for creating brilliant backgrounds, watercoloring, smudge effects and more! This package contains six 5-1/4 inch long water-reactive pigment crayons in assorted colors. Non-toxic. Conforms to ASTM D4236. Imported. Colors include Antiqued Bronze, Brushed Pewter, and Tarnished Brass.