Method for forming image and apparatus for forming image
AssigneeMitsubishi Chemical Corporation
InventorHideaki Okamoto
Life of this patent
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Abstract
A method for forming an image, which comprises subjecting a photosensitive layer of a photosensitive lithographic printing plate having a photosensitive layer comprising a photopolymerizable composition formed on a support surface to scanning exposure with a laser light having a wavelength in a range of from 650 to 1,300 nm, developing an image, and then further subjecting the photosensitive lithographic printing plate having the developed image to whole image exposure with a light exposure energy of from 1 to 70 times larger than the light exposure energy at the time of the laser light scanning exposure.
Claims23
A method for forming an image, which comprises subjecting a photosensitive layer of a photosensitive lithographic printing plate having a photosensitive layer comprising a photopolymerizable composition formed on a support surface to scanning exposure with a laser light having a wavelength in a range of from 650 to 1,300 nm, developing an image, and then further subjecting the photosensitive lithographic printing plate having the developed image to whole image exposure with a light exposure energy of from 1 to 70 times larger than the light exposure energy at the time of the laser light scanning exposure.
An apparatus for forming an image, which comprises continuously connecting the following steps (1) to (3):
- (1) a scanning exposure step of subjecting a photosensitive layer of a photosensitive lithographic printing plate having a photosensitive layer comprising a photopolymerizable composition formed on a support surface to scanning exposure with a laser light having a wavelength in a range of from 650 to 1,300 nm,
- (2) a developing step of developing an image on the photosensitive lithographic printing plate after the scanning exposure, and
- (3) a whole image exposure step of subjecting the photosensitive lithographic printing plate after the development to whole image exposure with a light exposure energy of from 1 to 70 times larger than the light exposure energy at the time of the laser light scanning exposure used at the step (1).
Dependencies are inferred from the claim text.