PURPOSE: To obtain photosensitivity to a light source of ≥750nm wavelength by incorporating a polymerizable compd. having an ethylenic unsatd. bond, the anion salt of the specific org. boron compd. having photosensitivity to ≥750nm wavelength and dye having an absorption peak at ≤700nm wavelength into the titled compsn.
CONSTITUTION: The polymerizable compd. having the ethylenic unsatd. bond, the anion salt of the org. boron compd. which is the org. cationic dye compd. expressed by formula I and having the sensitivity to ≥750nm wavelength light and the dye or pigment having the absorption peak at ≤700nm wavelength is incorporated into the above-mentioned compsn. In formula I, D+ denotes a cationic dye; R1WR4 denote the group selected from an alkyl group, substd. alkyl group, aryl group, substd. aryl group, substd. alkinyl group, alicyclic group., heterocyclic group, substd. heterocyclic group, etc. The photopolymeri zable compsn. which can be advantageously used for black and white or color images, has the photosensitivity to ≥750nm wavelength light and is suitable for formation of the visible images is thereby obtd.
SHINOZAKI FUMIAKI
ISHIGE SADAO
ADACHI KEIICHI
OKAZAKI MASAKI
