| abstract |
This patent describes an on-press developable thermosensitive lithographic plate having on a substrate a thermosensitive layer comprising an ethylenically unsaturated monomer, an infrared absorbing dye, and an onium or borate salt free radical initiator. The plate can be imagewise exposed with an infrared laser on a plate exposure device, and then mounted on a lithographic press for on-press development with ink and/or fountain solution and lithographic printing. No regular development process with a liquid developer is needed after exposure. Alternatively, the plate can be imagewise exposed with an infrared laser while mounted on a plate cylinder of a lithographic press, on-press developed with ink and/or fountain solution, and then print images to the receiving sheets. |