Abstract
The protective influence of glass of various spectral transmission characteristics on the light-induced fading of colored tablets has been investigated. The glasses were evaluated as to their effect on the fading rate of tablets colored with FD&C Blue No. 1 and D&C Yellow No. 10. The glass samples evaluated included flint, Georgia green, emerald green, champagne green, and ultraviolet-absorbing green, as well as plastic coated lantern slides incorporating ultraviolet-absorbing agents. The apparent rates of fading of the dyes were determined following exposure of the tablets to exaggerated illumination. Reflectance measurements performed on the tablets at intervals indicated that amber glass apparently afforded the greatest protection against the fading of both dyes under the condition of study.
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