Planographic Printing Plate

The planographic printing plate has a hydrophilic support and a hydrophobic image on the hydrophilic support. A method of producing the planographic printing plate includes (34)  

Irradiating the ink composition with active radiation rays to cure the ink composition to form a hydrophobic image on the hydrophUic support. 

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Polymerizable compositions, (IV) and (V), used as binder polymers in planographic printing plate compositions were prepared by Sugasaki et al. (6) and showed excellent printing durability test results. 

KAW 05] Kawuchi L, Planographic printing plate precursor, Patent EP 1627735 A2, 2005. 

The Toray Corporation of Japan has begun to market a planographic waterless plate which has apparently met with some success, particularly in Japan. This plate also utilizes a non-printing area of low surface energy which is surfaced with a polymer containing silicone moieties, but its image areas are surfaced with a photopolymer layer, Shimokawa (14). 

Offset lithography is a planographic process and depends on the chemical modification of the surface of the printing plate so that only the image areas accept ink and the nonimage areas accept water. 

Pantone printing n. Planographic printing proves using plates having mercury- or amalgam-coated non-printing areas. 

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