G - Physics – 03 – F
Patent
G - Physics
03
F
96/251
G03F 7/028 (2006.01) G03F 7/031 (2006.01) G03F 7/20 (2006.01)
Patent
CA 1338955
A process for the formation of an image comprises (i) applying to a substrate a layer of a liquid composition which comprises (A) a polymerizable material having, on average, more than one polymerizable acrylic group per molecule, (B) a first radiation-activated polymerization initiator for (A) and (C) a second radiation-activated polymerization initiator for (A), the initiator (B) being activatable by radiation of longer wavelength than that of radiation by which (C) is activatable, the composition being substantially free from polymerizable epoxide or vinyl ether groups when (B) or (C) is an aromatic onium salt, (ii) subjecting the composition to radiation having a wavelength at which one of (B) and (C) is activated but the other is not substantially activated, thereby polymerizing (A) such that the layer of liquid composition is solidified but remains curable, (iii) subjecting the solidified layer in a predetermined pattern to radiation having a wavelength at which the initiator not activated in stage (ii) is activated, such that in exposed areas the solidified layer is substantially cured, and (iv) removing areas of the solidified layer that have not been cured. The process is useful in the production of printing plates and printed circuits.
570730
Banks Christopher Paul
Irving Edward
Banks Christopher Paul
Fetherstonhaugh & Co.
Irving Edward
Vantico Ag
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