Precision. Precision for this test method has not been established. Until a precision statement is generat0.2 Bias. The whiteness and tint of textiles can be defined only in terms of a test method. There is no independent method for determining the true values. As a means of estimating these properties, the method has no known bias.ed for this test method, use standard statistical techniques in making any comparisons of test results for either within-laboratory or between-laboratory averages