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Arthur Ashworth
Joshua Buerger
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Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms
(AREA)
Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography
(AREA)
Abstract
23,816. Ashworth, A., and B³rger, J. Oct. 16. Dyes, artificial.-Dyes which yield a black shade upon unmordanted or chrome-mordanted wool are produced by combining with a-oxynaphthoic acid a diazo-azonaphthalene sulphonic acid, such as that derived from the combination of #-naphthylamine disulphonic acid-G with a-naphthylamine.
GB189723816D1897-10-161897-10-16Improvements in the Production of Colouring Matters.
ExpiredGB189723816A
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