On-press developable thermosensitive lithographic printing plates

摘要

This patent describes an on-press ink and/or fountain solution developable lithographic printing plates having on a substrate a thermosensitive layer capable of hardening upon exposure to an infrared radiation. The plate can be imagewise exposed with an infrared radiation and then on-press developed with ink and/or fountain solution by rotating the plate cylinder and engaging ink and/or fountain solution roller. The developed plate can then directly print images to the receiving sheets. The imagewise exposure can be performed off the press or with the plate being mounted on the plate cylinder of a lithographic press.