Nyloprint-sensitive patients react to NN' methylene bis acrylamide

Two patients showed occupational contact sensitization to a component present in the Nyloprint photopolymer printing plate. The component could not be identified chemically. It contains an acrylamide group. Both patients gave group-specific reactions to NN' methylene bis acrylamide. This must be a closely realted substance. Possible preventive measures are discussed. The manufacturer should have disclosed the allergic substance and instructed his customer adequately. A "philosophy" concerning this point is being developed.