Watersoluble ink blocks that bring a new sense of freedom to the drawing and painting experience, Derwent Inktense Blocks can be used dry or wet. Dry, they deliver pure, vibrant color. When wet, they create a translucent ink-like paint that can be worked over when dry. - Derwent Inktense Block Set - Set of 36Colart Derwent Inktense Blocks, 36/CT TIN - This set of 36 Derwent Inktense Blocks includes all of the colors in the Set of 24, plus 12 new colors, including Sienna Gold, Red Violet, Cherry, Mauve, Peacock Blue, Iron Blue, Turquoise, Iron Green, Felt Green, Tan, Saddle Brown, and Indian Ink. The tin also includes a mixing pallet built into the tray.