This document describes the grey scale for determining staining of adjacent fabrics in colour fastness tests, and its use. A precise colorimetric specification of the scale is given as a permanent record against which newly prepared working standards and standards that may have changed can be compared.
EN ISO 105-A03:2019 history
2019EN ISO 105-A03:2019 Textiles - Tests for colour fastness - Part A03: Grey scale for assessing staining (ISO 105-A03:2019)