Penetrameter Sensitivity of Color Radiography

Abstract

The following items were experimentally investigated to obtain color radiograph of superior quality by ¹⁹²Ir or ⁶⁰Co, using color films (Sakura nega color film and Kodak Ektachrome film) . (1) The influence of the combination of intensifying screens on the hue and image quality of color radiograph. (2) The conditions of second flashing, which are required to obtain better color contrast. (3) The penetratmeter sensitivities in color radiography.
Proper combination of intensifying screens improved the image quality of color radiograph, though the hue was a little changed.
The condition to obtain wide range of color change was confirmed to be that the film, half developed in the first bath, was exposed to red, yellow or green light for 0.2 to 5 seconds at 150 cm distance from 150 W lamp.
Second flashing procedure, properly practiced, could lead to high penetrameter sensitivity and wide latitude in color radiography.
These results are considered to favor the application of color radiography to the non destructive testing of complex shaped specimens with nonuniform thickness.