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 Tim Holtz Distress Crayon Set: Set #10, six 5-1/4 inch long water-reactive pigment crayons in assorted colors. Non-toxic. Conforms to ASTM D4236. Imported.