Visual Colour Assessment and Grey Scale Grading
topic
Visual colour assessment using ISO 105-A02 grey scale for colour change and A03 grey scale for staining grades the degree of colour loss in tested specimens and the degree of colour transfer to adjacent fabrics on five-point scales with half-grade interpolation, assessed by trained graders under D65 illuminant at defined geometry using standardised light booth conditions with 10 lux minimum illuminance.
Role
Provides the standardised visual reference system for colour fastness result grading that forms the basis of all ISO 105 colour fastness method result reporting, enabling consistent interpretation and communication of colour fastness test outcomes across laboratories and countries using the universally recognised grey scale reference standards.