Claims
- 1. A color proofing system which comprises, in combination, at least two dot-etchable masks, in registration with each other, each mask prepared from a different color separation negative and comprising a transparent support bearing a tone correctable image no more than 0.015 mm thick comprised of addition polymerized polymeric dots having a hardened upper skin which rests on a softer undervolume having a lesser degree of polymerization or hardening, said dots having an optical density greater than 3.0 in the 350-400 nm region and being reducible in size by undercutting the polymeric dots with a solvent for the softer undervolume and removal of hardened polymer from the edges of the hardened upper skin by mechanical action on the image bearing surface of the mask, characterized in that each mask has been colored in a spectral region corresponding to the color separation negative from which it was prepared.
- 2. A color proofing system according to claim 1 characterized in that the dot-etchable masks and color separation negatives correspond, respectively, to yellow, magenta and cyan.
- 3. A color proofing system according to claim 2 characterized in that a dot-etchable mask corresponding to the grey-black separation negative is present in the combination of masks.
Parent Case Info
This application is a division of U.S. Ser. No. 49,314, filed June 18, 1979 now U.S. Pat. No. 4,229,520 which is a continuation of U.S. application Ser. No. 741,039, filed Nov. 11, 1976, now abandoned, which is a continuation-in-part of U.S. application Ser. No. 632,726, filed Nov. 17, 1975, now abandoned.
US Referenced Citations (10)
Divisions (1)
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Number |
Date |
Country |
Parent |
49314 |
Jun 1979 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
741039 |
Nov 1976 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
632726 |
Nov 1975 |
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