Process using suction to form relief images

Claim 1

A process for formation of a relief image which comprises exposing a portion of a layer of a photosensitive composition provided on the surface of a support material to light through a negative to cure the exposed portion of the photosensitive composition and thereafter developing the image by eliminating the unexposed uncured photosensitive composition by suction, the photosensitive composition being a liquid composition containing no unsaturated polymeric material and having at least one addition polymerizable unsaturated monomer selected from the group consisting of C 7 -C 20 alkyl acrylates and methacrylates, poly(C 2 -C 3 ) alkylene glycol diacrylates and dimethacrylates having 9 to 14 alkylene glycol units, C 1 -C 3 alkoxypoly(C 2 -C 3 ) alkylene glycol acrylates and methacrylates having 9 to 14 alkylene glycol units, hydroxy (C 2 -C 3 ) alkyl acrylates and methacrylates, monoacryloyloxy (C 2 -C 3 ) alkyl and monomethacryloyloxy(C 2 -C 3 ) alkyl phthalates, and hydroxy(C 2 -C 3 ) alkyl acryloyloxy(C 2 -C 3 ) alkyl and methacryloyloxy(C 2 -C 3 )alkyl phthalates and at least one photopolymerization initiator, the initiator being present in an amount effective to photopolymerize the unsatuated monomer when the photosensitive composition is exposed to light.