Patent ID: 11971658
Assignee: ASAHI KASEL KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 0:
1. An ablation layer for a photosensitive resin for a relief printing plate, the ablation layer comprising at least an acid-modified polymer and an infrared-absorbing agent, and having
a layer acid value as defined below of 6 mg KOH/g or more and 400 mg KOH/g or less,
a neutralized salt ratio as defined below of 0.9 or less:

Layer acid value=(Acid value of the acid-modified polymer)×(Mass ratio of the acid-modified polymer to an entire ablation layer); and

Neutralized salt ratio=(Number of moles of polymer wherein acid in the acid-modified polymer exists in neutralized salt state)/(Total number of moles of the acid-modified polymer);

wherein the acid-modified polymer has a glass transition temperature of 40° C. or less.