Definitions
from The Century Dictionary.
- noun In chem., a salt of hydrosulphurous acid, now called hvposulphurous acid (H2S2O4).
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.), rare A saline compound of hydrosulphurous acid and a base.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Alternative spelling of
hydrosulfite .
Etymologies
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Examples
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It has many advantages over the hydrosulphite vat, as it is not nearly so much affected by changes of temperature and weather.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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If yarn is streaky, take 10 gallons of water at 120°F., 1 oz. of hydrosulphite powder, 2 fluid ozs. liquid ammonia fort. 880, and let yarn lie in same for 60 minutes.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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If the hydrosulphite be weighed beforehand and the stock of the same be kept free from damp air, or great heat, for future vats the hydrometer can be dispensed with; it is simply weighed out and added slowly to the water.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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It is a good thing to have hydrosulphite slightly in excess as this prevents premature oxidization; too much will strip off the indigo white already deposited on the yarn.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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Next take 5 pints water, add hydrosulphite slowly, stirring gently until a reading of 1100 is shown (SG 1.1) on the hydrometer.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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To the saucepan containing the indigo (100 per cent) add 7 fluid ozs. of the caustic soda solution, then gradually add 3-1/2 pints of hydrosulphite solution, stirring gently for 15 to 20 minutes.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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Between dips add Stock Solution as required, if the vat goes blue and turbid add 3 to 4 fluid ozs. of hydrosulphite and warm up to 140°F. and wait 30 minutes.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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If added too quickly the hydrosulphite will cake, fall to the bottom and be difficult to dissolve.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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Add 3 ozs. of hydrosulphite solution stirring carefully, let it stand for 20 minutes; this renders harmless any undissolved oxygen.
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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If dark spots show, this indicates undissolved indigo, therefore gradually add hydrosulphite solution (2-3 fluid ozs.).
Vegetable Dyes Being a Book of Recipes and Other Information Useful to the Dyer Ethel M. Mairet
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