Test the paper first for colour fastness.

Furthermore all tested items must have a skin-friendly pH value and good colour fastness.

'Methods of test for colour fastness of textiles or leather.'

Zero denotes extremely poor colour fastness whilst a rating of eight is deemed not to have altered from the original and thus credited as being lightfast and permanent.

This British Standard sets minimum levels of quality for colour fastness, backing materials, flammability, etc, before a carpet can be graded (with special requirements for stairs and bathrooms).

Light exposure and the stability of cosmetic products to light may be assessed by methods developed for colour fastness of textiles of which the following is an example: British Standard 1006: 1978.

Burmatex contract carpets and carpet tiles achieve the highest possible ratings in the BSI 4790 Flammability test for floorcoverings and are independently tested for anti-static, colour fastness, castor wheel resistance and durability.

There are good, consistent treatments of the synthesis and properties of the main chemical classes of colorants (chapters 4-7), but an especially appealing chapter is chapter 3, in which the structure of dye molecules is related to everyday dyeing practicalities, such as colour application and colour fastness.