G - Physics – 03 – C
Patent
G - Physics
03
C
101/61
G03C 1/76 (2006.01) G03F 7/095 (2006.01)
Patent
CA 1103089
ABSTRACT OF THE DISCLOSURE The invention is a method for producing a water developable litho- graphic printing plate which comprises treating at least one surface of a metal sheet substrate with a layer of a lithographically suitable, light sensitive, water soluble substance and subsequently coating the thus treated base sheet with an upper layer of a water-insoluble, ink receptive, litho- graphically suitable photosensitive composition. The photosensitive layers must be either both positive working or both negative working. The photo- sensitive composition is either water-permeable before exposure to actinic radiation and becomes water-impermeable upon exposure to actinic radiation or it is water-impermeable before exposure to actinic radiation and becomes water- permeable upon exposure to actinic radiation. Upon imagewise exposure through a mask by standard methods the exposed areas of said upper photosensitive composition become either water-permeable or water-impermeable and the un- exposed areas remain water-impermeable or water-permeable as opposed to the exposed areas. Upon said imagewise exposure, the exposed lower level areas in a negative system are rendered water insoluble whereas the exposed lower level areas in a positive system are rendered more water soluble than the unexposed areas.
302465
Chu Simon L.
Golda Eugene
Wilkes Alan L.
Osler Hoskin & Harcourt Llp
Polychrome Corporation
LandOfFree
Water developable lithographic printing plate having dual... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water developable lithographic printing plate having dual..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water developable lithographic printing plate having dual... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-513010