Accession Number:

AD0269756

Title:

THE PANCHROMATIC SENSITIZATION OF SINGLE CRYSTALS AND EVAPORATED FILMS OF SILVER BROMIDE

Descriptive Note:

Corporate Author:

TECHNICAL OPERATIONS INC BURLINGTON MA

Personal Author(s):

Report Date:

1962-01-01

Pagination or Media Count:

1.0

Abstract:

An experimental study is reported of methods of achieving the highest degree of red sensitization of single crystals and evaporated films of silver bromide. Variations in dye treatment, surface orientation, and surface area all failed to produce a reasonable level of panchromatic sensitization on crystals. The surface area of crystals was too low to allow sufficient dye pick-up for efficient sensitization. With evaporated films, two approaches were tried 1 screening of various classes of dyes to determine their relative efficiency for sensitizing these materials, and 2 improvement of the initial sensitivity of evaporated film samples by variation of the evaporation parameters. The latter approach proved to be the better. The dye sensitization of evaporated films having an initial sensitivity of ASA 0.1 when removed from the evaporator produced materials having over-all sensitivities of ASA 2 and red sensitivities through a Wratten 25 filter of 0.6. Preparation of a material sensitized to an ASA Exposure Index of 10 5500 K light source with a Wratten 25 filter factor of not more than 5, is shown to be within reach. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE