Have fun with the Derwent Grate ‘n’ Shake. Designed for use with Inktense Blocks the Grate ‘n’ Shake allows you to mix paint and create your own colours. Grate the Inktense Blocks into water and then shake the container to mix the pigment. The Grate ‘n’ Shake is ideal for creating translucent colour washes or painting ink to cover large areas. It can also be used with Aquatone Sticks.