In This study we studied and measured some optical properties, such as Transmittance and absorption by spectrophotometer (UV-1800), manufactured by the Japanese company Shemadzo, for four samples of polymer (PVA), where the first sample was pure and the three samples were mixed by (1,2 and 3)g of KI. The results showed that Transmittance decreased with increased of impurities, but absorption showed opposite behavior, the four models contain (10g of PVA and 1, 2, and 3gmof KI), where the results was different for the models.