Dialo printing plate made from laser

Details Dialo printing plate made from laser Dialo printing plate made from laser

1978-12-07

1984-12-04

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430175, 430177, 430179, 430145, 430294, 430302, 430945, G03F 708

Patent

active

044865295

ABSTRACT:
This invention relates to an improvement in a photochemical process for the preparation of printing plates wherein a printing plate comprising a photosensitive composition coated on a support is exposed to a pattern of laser light, the intensity of which is modulated in accordance with an input source of information and said printing plate is subsequently developed by removal from said support of that portion of the photosensitive coating composition which is not exposed to said pattern of laser light, the improvement comprising utilizing a pattern of laser light generated by a laser at a wavelength greater than about 450 nm, and utilizing as a photosensitive composition a negative-working condensate of a para-aminobenzene diazonium compound, said compound being present in a quality of at least 25% of the total coating weight.

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patent: 3890152 (1975-06-01), Ruckert et al.
patent: 3899332 (1975-08-01), Traskos
Anon, Research Disclosure, #101, 9/1972, pp. 35-36.
Chebiniak, P. et al., IBM Technical Disclosure Bulletin, vol. 13, No. 2, 1970, p. 345.
Dinaburg, M. S., "Photosensitive Diazo Compounds", The Focal Press, 1964, pp. 22-25 and 154-157 and 162-166.
Kosar, J., "Light-Sensitive Systems", J. Wiley & Sons, 1965, pp. 197-199, 201 and 294.
Landau, R., The Journal of Photographic Science, vol. 13, 1965, pp. 144-151.

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