Clear and Pigmented Epoxy Resins for Stained Glass Conservation: Light Ageing Studies

Daylight and accelerated ageing tests on a series of clear epoxy resins are described and the results discussed in terms of their tendency to yellow on exposure to light. Some factors important in the yellowing process are described. A series of dyestuffs which disperse easily in epoxy resin to give transparent casts with good light-fastness is reported.