Patent ID: 11858252
Assignee: DUPONT ELECTRONICS, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 7:
8. A method of making a printing form precursor comprising:
a) printing a plurality of features with an ink onto a surface of a coversheet to form a pattern layer on the surface, wherein the pattern layer comprises a plurality of features wherein each feature has an area between 5 to 750 square microns, and the ink is opaque to actinic radiation and transparent to infrared radiation;
b) applying an infrared sensitive composition to the pattern layer to form an infrared ablation layer;
c) exposing to infrared radiation to cause ablation to the infrared ablation layer;
d) laminating onto a surface of a photopolymerizable layer comprising a first binder, a monomer, and a photoinitiator, that is opposite a support for the photopolymerizable layer, wherein the pattern layer is disposed between the infrared ablation layer and the coversheet; and wherein the infrared ablation layer is for forming an in-situ mask by infrared ablation during conversion of the printing form precursor to a relief printing form.