CLEARSNAP Colorbox Pigment Paintbox 2-Option Pad, Brights, 12 Colors Per Pad Option pads feature removable color pads within each pad for expanded versatility Ideal for creating various color spectrum and direct-to-paper techniques Colorbox pigment pads are water based and formulated to stamp on absorbent papers Slow drying inks are rich thick fade resistant non-bleeding acid free and archival Non-toxic; ASTM D4236 approved