The Speedball Water-Soluble Block Printing Ink is the industry leader and a favorite among artists and students. These premium printmaking inks are all ground and milled to the perfect consistency which create bold prints that dry to a rich, satiny finish. Included in this set are 1.25 fluid ounce tubes of black, red, blue and yellow ink. This ink is ideal for block and relief printing. Use it on linoleum, wood, Speedy-Cut Easy, Speedy-Cut, Speedy-Carve and Polyprint. The block printing ink has nice tack which ensures even coverage and allows you to produce consistent, spectacular results every time. There is no messy clean up when using this block printing ink. When you are done with your project the ink will come right off you using soap and water. The Speedball Block Printing Ink Set is safe for adults and children to use. It is ACMI AP Certified and conforms to ASTM D-4236.