Patent ID: 8153347

Claim:
A relief printing precursor that is a flexographic printing precursor that is in the form of a flexographic printing plate, sleeve, or cylinder precursor, the relief printing precursor comprising at least: a first radiation-sensitive layer that comprises a radiation-sensitive composition that is sensitive to and curable by a first imaging radiation comprising a first λ max , a second radiation-sensitive layer disposed on said first radiation-sensitive layer, said second radiation-sensitive layer that comprises a radiation-sensitive composition that is sensitive to and curable by a second imaging radiation comprising a second λ max that differs from said first λ max by at least 25 nm, wherein the second radiation-sensitive layer is insensitive to the first imaging radiation comprising a first λ max , and an infrared radiation ablatable layer disposed on said second radiation-sensitive layer, said ablatable layer being opaque to said first and second imaging radiations and comprising an infrared radiation absorbing compound.