Radiation imagery chemistry: process – composition – or product th – Stripping process or element – Element
Patent
1997-03-24
1998-04-14
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Stripping process or element
Element
430257, 430260, 430262, G03C 1112
Patent
active
057389705
ABSTRACT:
A negative-acting color proofing element comprising, sequentially, (i) a strippable, transparent cover sheet; (ii) a crosslinked layer, which comprises a polymer having phenolic groups; (iii) a color layer, which comprises an organic binder, a polymerizable monomer, a colorant, and an optional photoinitiator, (iv) a photoadhering layer, which comprises a polymerizable component having at least one ethylenically unsaturated group; a polymer comprising polyvinyl acetal and polyvinyl alcohol segments, having from about 1 to about 40 weight % polyvinyl alcohol content; and an optional photoinitiator, wherein least one of either the color layer or the photoadhering layer contains a photoinitiator; (v) a thermoplastic adhesive layer; and (vii) a receiver sheet. Preferably the polymerizable component and photoinitiator diffuse into the color layer during assembly of the element. An image is produced by laminating the photosensitive element to a receiver sheet; imagewise exposing the color layer and the photoadhering layer to actinic radiation through the transparent cover and crosslinked phenolic layer; peeling apart the receiver sheet and the transparent cover sheet, leaving exposed areas of the color layer attached to the receiver sheet via the photoadhering layer and adhesive layer and unexposed areas being removed with the cover sheet and the crosslinked phenolic layer, thereby forming a colored negative image on the receiver sheet. Preferably these image producing steps are repeated at least once wherein another photosensitive element having a different colorant is transferred via its photoadhering and adhesive layers to the negative image previously produced on the receiver sheet.
REFERENCES:
patent: 4766053 (1988-08-01), Shinozaki et al.
patent: 5300399 (1994-04-01), Wilczak
patent: 5409800 (1995-04-01), Sato et al.
Hsieh Shane
Koenigkramer Rusty
Liu Shuchen
Shadrach Richard
Siegfried David
Bayer Corporation
Le Hoa Van
LandOfFree
Negative working, peel developable, single sheet color proofing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Negative working, peel developable, single sheet color proofing , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative working, peel developable, single sheet color proofing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-633498