Study on hydrophobization of a thiol compound on silver surface of CTP printing plate

A thiol compound with a long hydrocarbon chain was introduced into the deve loping solution for a silver chloride DTR printing plate. It was found that the hydrophobicity of physically developed silver area could be greatly im proved. The higher the silver density and thiol concentration were, the gre ater the hydrophobicity of the silver surface was. Raman and XPS study reve aled that hydrophobization was caused by adsorption of the thiol compound o n physically developed silver particles on the plate.