Versatile watersoluble pencils can be used wet or dry. Highly pigmented dry color transforms into a pure, translucent ink-like wash that is permanent once dry. Due to its permanence, Inktense can be worked over again without affecting the previous layer. Suitable for use on silk and cotton, as well as paper. 12 colors. 7" long, pre-sharpened pencils with 4mm leads. AP Seal, non-toxic.