Specification of the Patent Granted to Mr. Joseph Barton for an Improved Method of Preparing Indigo for the Purpose of Dying Wool, Silk, Cotton, and Other Articles
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Two-page specification of an English patent dated March 25, 1797, granted to Joseph Barton, a London chemist, for an improved method of preparing indigo for dyeing wool, silk, linen, cotton and other goods, and for giving blue shades to linens, woollens and papers. The text explains that quantities cannot be fixed because indigo varies in quality. It describes grinding the indigo finely, dissolving it in acid or alkaline solvents, adding tin, iron, zinc or alum as a fixing base, and neutralizing excess solvent so the colour stays durable and bright.
- Type
- Article
- Date
- 1798
- Language
- English
- Pages
- 2
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From Ralph Griswold's Digital Archive, delivered by the University of Arizona.
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