| abstract |
An imageable coating, a thermal negative-working lithography printing plate, and a platemaking method therefor. The imageable coating comprises the following constituents in parts by weight: a radically polymerizable compound 20-60 parts, a radiation-absorbing compound 0.5-12 parts, a free radical initiator 1-25 parts, a binding agent 10-70 parts, and a development accelerator 0.5-15 parts. The platemaking method comprises the following steps: S1, manufacturing a printing plate precursor, the printing plate precursor comprising a substrate having a hydrophilic surface or being provided with a hydrophilic layer and the imageable coating covering the substrate; S2, patternedly exposing the printing plate precursor, thus forming an exposed area and an unexposed area; and S3, removing the unexposed area via a development process. The employment of the imageable coating and the plate making method allows the implementation of a flexible development process of "in-unit development" or "off-unit development" and produces a printing plate provided with great printing performance. |