ASTM D61 Standard Test Method for Softening Point of Pitches (Cube-in-Water Method)
10. Report
10.1 Report the average value found in 9.1.3, rounded to the nearest 1 °F (0.5 °C) as the softening point (cube-in-water).
11. Precision and Bias
11.1 The following criteria shall be used for judging the acceptability of the results (95 % confidence level):
11.1.1 Repeatability - Duplicate values by the same operator shall not be considered suspect unless they differ by more than 3 °F (1.5 °C).
11.1.2 Reproducibility - The values reported by each of two laboratories shall not be considered suspect unless they differ by more than 5 °F (3 °C).
11.1.3 Bias - The procedure in Test Method D61 for softening point has no bias because the value of softening point is defined only in the terms of this test method.
12. Keywords
12.1 cube-in-water; pitch; softening point
