Method for on-press developable lithographic plate utilizing light-blocking material

A method of lithographically printing images on a receiving medium, comprising in order:

• (a) providing a lithographic plate comprising on a substrate a photosensitive layer soluble or dispersible in ink and/or fountain solution and capable of hardening upon exposure to a laser having a wavelength selected from 200 to 1200 nm;
• (b) imagewise exposing said plate with said laser to cause hardening of said photosensitive layer in the exposed areas, so as to form hardened areas in the exposed areas and non-hardened areas in the non-exposed areas;
• (c) applying a light-blocking material onto said plate on at least the photosensitive layer coated side, wherein said light-blocking material as applied to said plate prevents at least a portion of light within the wavelength range of from 200 to 780 nm from reaching said photosensitive layer;
• (d) developing said plate with ink and/or fountain solution on a lithographic press to remove the non-hardened areas of said photosensitive layer;
• and
• (e) lithographically printing images from said plate to the receiving medium.