The superposition of autoradiographs and micrographs using the kodak dye transfer process

A kodak dye transfer process is described for making a composite print showing the autoradiograph and micrograph of metallic specimens in appropriate colors. The autoradiograph and micrograph are used in place of separation negatives to make composite prints which are more easily interpreted than separate or superposed black and white prints. Examples shown include an autoradiograph obtained using copper-64 as a tracer to show the distribution of copper in an aluminum -copper alloy, and the distribution of chromium in an aluminum - zinc - magnesium -chromium alloy. The matrices were dyed to give a suitable contrast in colors. (C.H.)