India Ink.

Manufacturer and builder ?, 1891

I find that a color apparently identical to India ink can be produced by the action of sulphuric acid on camphor. An excess of camphor should remain some twenty-four hours in strong sulphuric acid; it then results in a gelatinous mass of a slightly reddish color. This when heated, effervesces, gives off fumes of sulphurous acid and turns intensely black. By evaporation the superfluous sulphuric acid and camphor — for there remains an excess of both, the weakened acid not acting on the camphor — can be driven off. The remainder when applied to paper as a paint, appears, to my inartistic eye, to be India ink. When dissolved in water, it remains an indefinite time without precipitating. It appears to be dissolved, not held in suspencion.

Correspondent of the Chemical News.

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