Abstract: Relief precursors with an enhanced capacity to be developed into high performing relief structures, more in particular high quality relief structures such as printing plates. A photosensitive composition (PC) for forming a photosensitive layer of a relief precursor (RP), comprising particular stabilizers and binders. By including the stabilizer and binder as described herein the stability of the melt of the photosensitive composition during production, e.g. production by extrusion, can be enhanced significantly. Such enhanced stability could be achieved without or with minimal undesired impact on the resulting printing performance and/or imaging characteristics of the reliefs formed by developing the relief precursors.

Abstract: A relief precursor includes a dimensionally stable support, and at least one photopolymer layer including at least one binder, at least one photoinitiator or photoinitiating system, and at least one component with at least one unsaturated group and at least one plasticizer. The at least one plasticizer is a bio-based plasticizer, and has a UV transmission at 365 nm of a solution of 5 wt % plasticizer in n-hexane of higher than 15%.