AATCC 178-2004
1. Purpose and Scope1.1 Barr is the optical result of physical or dye differences in the yarns, geometric differences in the fabric structure, or any combination of these differences. This test method provides a standard procedure for evaluating barr intensity and for describing pattern characteristics based on visual comparison to a Uniformity Reference Scale and description of the barr pattern using a standard terminology. It can be used with knitted fabrics, woven fabrics and garments. The standard terminology is particularly useful in oral and written communications.
