A study of the tritium losses from five tritiated phosphor paints showed that the losses from these paints were generally low. Samples of five different paints which were leach tested six times over a period of 11 months had losses ranging from 0.018 to 0.731% of the initial activity in the samples. Tritium evolved from a paint which had been cured for 3 months after application was 0.011% of the initial activity during a 9-hr sampling period. Tritium evolved from two groups of wrist watches having painted disks or hands and maintained at body temperature (98.6 deg F) was 0.238 and 0.058 mu Ci/day watch. Losses during paint drying at 28 deg C during a 4.5-hr period ranged from 0.142 to 2.32% of the initial activity. Tests were also made to determine the effects of paint thickness and exposed surface area on the losses. (auth)