PubMed · 6499414
Patch testing with colophony.
Abstract
Colophony (rosin) has been fractionated into 2 parts, an acidic and a neutral fraction. Routine patch testing with neutral components gives positive reactions at a 40% higher frequency than routine patch testing with colophony (20%) (w/w in pet.). A concentration of 60% colophony is suggested for routine patch testing.
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S Fregert, B Gruvberger. 1984. Patch testing with colophony.. https://doi.org/10.1111/j.1600-0536.1984.tb00958.x
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