Method of using diazotype photographic materials with preexposur

Details Method of using diazotype photographic materials with preexposur Method of using diazotype photographic materials with preexposur

1982-11-12

1985-04-02

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Diazo-type process, i.e., producing dye image by reacting...

430141, 430168, 430169, 430152, 430176, 430290, 430327, 430494, G03C 518

Patent

active

045088080

ABSTRACT:
An improved diazotype photoprinting material of high printing speed and its method of preparation are disclosed. The improvement is achieved by distributing through the film coating a substantially uniform distribution of sites having a refractive index substantially different from that of the remainder of the coating. The sites consist of either voids or finely divided solids. Voids are created by contacting the film coating with an aqueous fluid at elevated temperature or an organic solvent for a sufficient period of time to cause a measurable haze to appear on the film. The sites operate to reflect or refract incident light rays during imagewise exposure, and thus increase the optical path length through a given thickness of film.

REFERENCES:
patent: 2501874 (1950-03-01), Peterson
patent: 2908572 (1959-10-01), Schoen et al.
patent: 3149971 (1964-09-01), Baril et al.
patent: 3301679 (1967-01-01), Halperin et al.
patent: 3408192 (1968-10-01), Aebi
patent: 3493371 (1970-02-01), Poot
patent: 3622333 (1971-11-01), Cope
patent: 3841874 (1974-10-01), Nishino
patent: 4152156 (1979-05-01), Voisin
Cope, O. J., "Diazo and Vesicular Microfilm Technologies," J. of Applied Photo. Eng., vol. 8, No. 5, pp. 190-199, 10/1982.
"The Diazotype Printing Process a Review," Dr. Louis van der Grinten, The Photographic Journal, vol. 92B (1952), pp. 43-48.
"Diazo Compounds in the Photocopying Industry," R. Landau, et al., The Journal of Photographic Science, vol. 13 (1965), pp. 144-151.

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