Method of making radiochromic dosimeter using Calcein dye

A method of making a radiochromic dosimeter film, comprising:

• dissolving 0.51 g of a Calcein indicator in 300 ml of distilled water to make a Calcein dye solution,
• stirring the Calcein dye solution continuously at a room temperature for 5 minutes to ensure homogenous solution;
• dissolving 21.0 g polyvinyl alcohol (PVA) powder in 300 ml of distilled water at temperature of 70° C. to make a PVA solution;
• magnetically stirring the PVA solution at 70° C. temperature for 24 hours and then left to cool at room temperature;
• adding portion of the PVA solution and the Calcein dye solution to make a mixture of a PVA-Calcein solution;
• stirring the PVA-Calcein solution continuously for 3 hours using a magnetic stirrer in order to obtain a uniformly mixed PVA-Calcein dye solution;
• and
• pouring the uniformly mixed PVA-Calcein dye solution onto a horizontal plastic plate and dried at room temperature for 3 to 5 days to make the radiochromic dosimeter film;
• and
• peeling off the radiochromic dosimeter film and cutting into 1×3 cm pieces, dried, stored and prepared for irradiation.