give 70 80 wet pick up of solution the impregnated samples were placed on pin frames under moderate tension and dried at 200 u00b0 f for 1 5 minutes followed by curing at 340 u00b0 f for five minutes in a forced draft oven the cured fabrics were tested for flammability before and after machine washing utilizing the standard for the flammability of children 39 s sleepwear doc ff 3 71 as amended durability of the additive finish wastested by normal home launderings procedures aatcc test method 124 1969 in hot water utilizing a phosphate detergent aatcc no 124 the cloth was dried between washings in a tumble drier the results are reported in tables i and ii for 1 diethylphosphoro semicarbazide and 1 bis 2 chloroethyl phosphoro semicarbazide respectively the ethyl ester table i was shown to be durable to 50 launderings when used with trimethylolmelamine elemental analysis of the treated cloth showed 71 of the phosphorus originally present was retainedafter 50 washes leachable phosphorus was removed within the first five washes from the fifth wash little change in phosphorus content occurred 1 bis 2 chloroethyl phosphoro semicarbazide cured at 340 u00b0 f for5 minutes produced a slight discoloration of the cotton fabric it was found that this discoloration was readily controlled by utilizing lower cure temperature in view of the limited loss of leachable phosphorus after 5 washings the tests for this compound were limited to 5 washings comparing various cure temperatures a cure temperature as low as 220 u00b0 f could be utilized.