Abstract
A method to get a single roentgenogram stained with two colors is described. A usual medical x-ray film was exposed by two steps. The first exposure was made with the combination of the front piece of the intensifying screens and film, and the second exposure with that of the back piece of the intensifying screens and the back of the same film. The front and back of the roentgenogram were stained with magenta developer and cyanate developer respectively. In this roentgeno-graphy the total exposure dose and the image quality were almost the same as that of the usual roentgenography.
