Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. multidisciplinary concepts
5. standards (authoritative exemplars)

Anotations

Scope note:

An ISO standard developed to measure and calibrate lightfastness and fading of colorants and other materials. It consists of a card that contains eight sections of blue-dyed wool cloth, each with a different lightfastness. The dyes fade at a known rate.