The scope for this proposed revision change includes to allow for the optional use of a dye to help differentiate the layers in D1401 testing. Colorless and dark fluids tested in D1401 can be difficult for the test operator to distinguish between the oil, water, and emulsion layers. An oil-soluble dye was found to help differentiate these layers without affecting the test results. 88 oils (44 pairs of dyed and undyed) were tested at 5 labs and the results were within the D1401-10 precision. The dyed samples helped the operator differentiate the layers without affecting results. This option was approved at D02.C0; but the committee decided to move this into an Appendix.
emulsion; petroleum oils; steam-turbine oils; synthetic fluids; water separability; Emulsion characteristics; Heavier-than-water fluids; Petroleum oils; Synthetic fluids;
Citing ASTM Standards
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