PHOTOGRAPHIC AND MECHANICAL PROPERTIES OF NUCLEAR RESEARCH EMULSIONS.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Pagination or Media Count:
The effects of heating Ilford types G and K emulsion prior to exposure or processing have been studied. Samples were heated at 55-60 C for times up to 16 days, and other samples were assembled into stacks in which a temperature gradient -20 to 100 C was maintained. It was found that sensitivity to fast electron tracks can be increased by heating and drying, but that for each emulsion type there is a rather critical temperature above the growth of random fog grain background soon makes the emulsion useless. Attempts to remove the latent image showed that track images are removed more easily than the background, so that the usefulness of emulsions that have been heated too much cannot be regained. We noted an interesting difference in the behavior of pellicles and pre-mounted plates which suggests that the plates are less affected by high temperatures. Measurements of Brinell hardness and thermal conductivity as a function of the humidity are reported, as are several comments on the handling of dry emulsions. Author
- Printing and Graphic Arts