Derwent Inktense blocks are a water soluble medium, combining the versatility of Inktense pencils and the freedom of blocks. These blocks open up a world of endless possibilities for covering large areas and creating expressive marks. Add water to create a pure, translucent, ink-like effect. Intense becomes permanent when dry so you can work on top of it. Use on paper, canvas, silk or cotton. This tin contains blocks in the following colors: Sherbet Lemon, Sun Yellow, Tangerine, Poppy Red, Chilli Red, Shiraz, Fuchsia, Violet, Iris Blue, Bright Blue, Deep Indigo, Sea Blue, Teal Green, Ionian Green, Apple Green, Field Green, Leaf Green, Mustard, Baked Earth, Willow, Bark, Charcoal Grey, Ink Black, and Antique White.