EXPLANATION
This test method indicates the ability of the emulsion to withstand mild to moderately severe winter conditions of use and storage. Generally this significance would be limited to conditions where the emulsion reaches a minimum temperature of -18° C (0 ° F).
TEST SUMMARY
A 100-mL sample in a graduated 100-mL cylinder is placed in a cooling box at -18° C for 16 h and then allowed to stand at room temperature for 8 h. This procedure is repeated for a total of nine times, except the fifth cycle is one of 64 h at -18° C, 8 h at room temperature. At the completion of this cycle, the sample is examined for the amount of free oil and free water separated. In addition, water contents of the sample at specified levels in the upper and lower layers of the sample are also obtained.
TEST PRECISION
This test method has no bias.