Abstract
ABSTRACT: Various nickel salts have been synthesized, and their protecting effects on photofading of Orange I (C. I. Acid Orange 20), Rose Bengal (C. I. Acid Red 94), Crystal Violet (C. I. Basic Violet 3) and Eosine (C. I. Acid Red 87) were examined in cellulose acetate film with carbon arc Fade Ometer. The rates of photofading of the dyes were remarkably suppressed in the presence of nickel salts, while the addition of UV absorber afforded little retardation of the rate of fading. The effects of combined use of nickel salt and UV absorber on the photostability of dyes were also examined.
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