Hunkydory Prism Watercolour Pencils Set. Prism watercolour pencils contain a smooth, water soluble pigment perfect for watercolour projects both in art and craft. This set contains 48 colurs and comes in a portable, roll up storage pouch, perfect for taking to classes or workshops, and taking up minimal space in your craft room. The pencils have a non toxic, laquered exterior and strong leads for minimal breakage. The pencils can be used both with and without water.