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A fire test which can be conducted in the laboratory and which is suitable for the quality control of foam liquids is described. The test fire was 56.5 cm dia and 9 litres of fuel were used for each test. The foam was applied as a jet from a model branchpipe at 3.0 l/m^2/min. Control and extinction times were measured and a burn-back resistance test was made. Test results are given for 17 samples of foam liquid representing all groups. The test fire was 56.5 cm dia and 9 litres of fuel were used for each test. Duplicate fire tests were made with each foam liquid and three aviation fuels. Values are proposed for the quality control of protein, fluoroprotein, and fluorochemical foam liquids.