THE EFFECT of gamma irradiation on absorption properties of ….. carbolfuchsin (CF) with gelatin blended for possible use in dosimetry and measurement of radiation dose in gamma rays have been studied using UV-Visible spectrophotometer method. The gelatin (polymer gel capsulated dyed) were irradiated to different accumulated doses from 1 up to 50Gy using gamma rays source at a constant dose rate. The absorption spectra were measured using UV-Visible spectrophotometer in the wavelength range (200 to 900) nm, resulting in a decrease of the absorbance at 560nm band peak with increasing dose.