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James Yate Johnson
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Publication of GB190509547ApublicationCriticalpatent/GB190509547A/en
9547. Johnson, J. Y., [Badische Anilin & Soda Fabrik]. May 5. Dyes, artificial.-A dye, dyeing wool orange-red shades which are turned reddish-black on treatment with bichromate, is produced by heating naphthazarin in aqueou.s solution with more than two molecular proportions of caustic soda, praferably while passing air through the mixture. When printed on cotton with chromium acetate, the dye gives a very fast full black. The dye forms a soluble compound with sodium bisulphite.
GB190509547D1905-05-051905-05-05Improvements in the Manufacture and Production of Colouring Matter of the Naphthalene Series
ExpiredGB190509547A
(en)
Improvements in the Manufacture and Production of Colouring Matter of the Anthracene Series, and the Treatment and Employment thereof for Dyeing and Printing.