Patent ID: 8133658

Claim:
A process for developing a lithographic plate, comprising: (a) selecting an imaged plate having (i) a substrate with a grained, anodized, hydrophilic surface; (ii) a negative working, organic, polymerizable coating in which all active components for polymerization are insoluble in water; (iii) wherein said coating is non-ionically bonded to the substrate and has been imaged by polymerization in areas exposed to radiation, such that the cohesion of the unimaged areas of the coating exceeds the adhesion of the unimaged areas of the coating to the substrate; and (b) subjecting the entire coating to mechanical forces which disrupt and remove only the unimaged areas of the coating from the substrate in the form of particulate material and without solubilization of either the imaged or unimaged areas of the coating, wherein the mechanical forces are provided by pulling on the coating.