Method of forming images

A process of forming an image on an image forming material comprising a support and provided thereon, an adhesive layer a photosensitive layer and a covering layer in that order to form an image, comprising the steps of:

• imagewise exposing the material by laser beam scanning using a semiconductor laser;
• and
• peeling the covering film from the exposed material to form images of exposed portions on the support, wherein said photosensitive layer contains a colorant, an addition-polymerizable or cross-linkable compound and an effective amount to initiate photopolymerization of a photopolymerization initiator which is a salt of a cationic dye with a borate anion,
• said borate anion being represented by the following Formula (1):
• ##STR6## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent an alkyl group, an aryl group, an aralkyl group, an alkenyl group, an alkinyl group, a cycloalkyl group, or a heterocyclic group;
• and
• said cationic dye being selected from the group consisting of cyanine dyes, indoaniline dyes and azulenium dyes.