The formula of a radiochromic film dosimeters containing pararosaniline cyanide(PR-CN)dye in nylon have been developed.The color of the film changes gradually from colorless to red plum when absorbed dose is over several thousand Gy.In this work,dosimetric properties of radiochromic film dosimeters with different dye concentration of 2%and 5%have been studied.The results of dosimetric test show that the dose- The formula of a radiochromic film dosimeters containing pararosaniline cyanide (PR-CN) dye in nylon have been developed. The color of the film changes gradually from colorless to red plum when absorbed dose is over several thousand Gy. This work, dosimetric properties of radiochromic film dosimeters with different dye concentration of 2% and 5% have been studied. The results of dosimetric test show that the dose-