Dummy plate for offset printing

摘要

A dummy plate for offset printing comprising essentially a mechanically and/or electrochemically roughened, anodically oxidized and hydrophilized aluminium support in the form of a plate, sheet or band and a non light-sensitive, water-soluble layer coated thereon, and characterized in that the layer contains at least one organic polymer with a water-solubility of at least 2 g/L at room temperature and at least one inorganic compound reacting as an acid.