Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Reexamination Certificate
2007-06-05
2007-06-05
Lee, Sin (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
C430S275100
Reexamination Certificate
active
10703628
ABSTRACT:
There is provided an alkaline soluble positive-type photosensitive composition having an infrared wavelength range laser sensitive characteristic. There is also provided a positive-type photosensitive composition not requiring any burning operation, capable of attaining a requisite and sufficient close fitness in coating operation under a condition of indoor working room humidity of 25 to 60%, capable of attaining a development not producing any residuals while keeping a high sensitivity, cutting it with a sharp contour, attaining a quite hard resist film and improving an anti-scar characteristic in a handling before developing operation. This composition includes an alkaline soluble organic high molecular substance having a phenolic hydroxyl group; photo-thermal conversion substance for absorbing infrared rays of an image exposure light source; and a close-fitness modifying agent such as polyvinylpolypirrolidone/polyvinylacetatecopolymer and the like.
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Lee Sin
Rader & Fishman & Grauer, PLLC
Think Laboratory Co., Ltd.
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