Used as light fastness standards test for the effects of light on paintings, documents, and textiles.
Each card features eight pieces of wool cloth tinted with blue dyes of different degrees of fastness mounted to 127x38mm card.
They allow you to monitor the net exposure to light given to objects on display and to alert conservators to rotate an exhibit or to adjust intensity of illumination.
Sold as a single card
These cards conform to the following standards:
ISO 105-B01 & ISO 105-B02
IUF 401 & IUF 402
Material composition of the strips is as follows:
Reference 1, Acid Blue 104
Reference 2, Acid Blue 109
Reference 3, Acid Blue 83
Reference 4, Acid Blue 121
Reference 5, Acid Blue 47
Reference 6, Acid Blue 23
Reference 7, Solubilized Vat Blue 5
Reference 8, Solubilized Vat Blue 8