An all purpose water-soluble Red Blockout for use with solvent-resistant films and emulsions. Has excellent flexibility, is non-cracking, resists humidity, prevents sagging screens and does not become tacky in any weather. It also has a creamy consistency and is easy-to-use right from the container. Does not chalk or peel on the screen. It has excellent drying properties. Blockout dries to a tough but flexible coating that lasts through very long printing runs.