2-Hydroxy- ethyl-methacrylate and di and tetraethylene glycol dimethacrylate: Contact sensitizers in a photoprepolymer printing plate procedure

In a platemaking procedure differing from Nyloprint and Letterflex, contact sensitizations to 2-hydroxy-ethyl-methacrylate, di- and tetraethylene glycol dimethacrylate and nicotinic acid were found. Preoperational testing of the complete mixture gave a false impression of safety. Preventive measures and enumeration of acrylic substances so far recognized as sensitizers or cross-sensitizers are discussed.