Photographic printing method

Details Photographic printing method Photographic printing method

1987-08-03

1989-01-10

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Methods

355 38, G03B 2732

Patent

active

047977132

ABSTRACT:
When a number of prints of an image frame are made at a time or different times for the multiple printing, test printing, or re-printing thereof, it is needed to have them printed under the same condition and mode. However, it has been difficult to produce them without a deviation or variation of densities even when the same selected image frame is printed, because the photometric measurement of the image frame has been made conventionally before each time of printing for the operation and determination thereby of an exposure amount under which the printing is made, and because such photometric measurement at each time of printing gives an exposure amount which is slightly different at each time. In this invention, photometric data of a specific image frame which has been printed once are memorized, and when the specific image frame is to be printed once again, the frame is printed always at an entirely constant density on the basis of the data memorized and read-out at each succeeding printing.

REFERENCES:
patent: 4260244 (1981-04-01), Laska et al.
patent: 4293215 (1981-10-01), Rosborough, Jr. et al.
patent: 4563083 (1986-01-01), Shiota
patent: 4659213 (1987-04-01), Matsumoto

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