REEVES-Derwent Inktense Blocks Tin. These watersoluble ink blocks combine the versatility of Inktense with the freedom of blocks. When water is added deep intense colors are created. Once dry; it becomes permanent and can be worked over with affecting the layers of vivid color. This package contains twelve blocks: sun yellow; tangerine; poppy red; fuchsia; deep indigo; sea blue; teal green; apple green; leaf green; baked earth; bark and ink black. Conforms to ASTM D4236. Imported.