X1.3.2 Reproducibility (R)- The difference between two single and independent results obtained by different operators working in different laboratories on identical test material would, in the long run, in the normal and correct operation of the test method exceed the following values only in one case in twenty. Reproducibility may be calculated as shown in Eg X1.11 for all materials covering the full scope of the method. See Table X1.3 for calculated values.