A bulk cast, radiachromic dye sensitized, plastic dosimeter for ionizing radiation is to be examined. A visually read, transparent device which colors on radiation exposure is proposed. This device is read visually by comparison with dyed paper or card stock to give an estimate of exposure dose without the need for any electronic equipment. The system is based on triphenyl methane leuco dyes in solution in bulk cast polymers derived from ring substituted derivatives of polystyrene. the sensitivity, stability and utility of this concept are explored as are the conditions necessary for visual dose estimation.
