Abstract
AbstractPrecipitated microcrystals of lead iodide were suspended in such binders as gelatin or polyvinyl alcohol and coated. An image may be printed out at 100° C with a strong light incandescent light, and stabilized with any of a number of complexing agents. Contrast is reduced by stabilization, but this may be minimized by using a web processing method. Spectralsensitivity measurements agreed well with those of Tubbs on the photoconductivity of single crystals. Variations in the emulsion formulation were studied with respect to their effects on photolytic response, on the temperature dependence of the response and on resolving power. Typical formulations are given. One variation gives a coating which is insensitive until thermally “ripened”. A survey of the prior art is included. 39 references.
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