Borax is a mild alkaline body, and as a detergent is probably equivalent to a slight excess of caustic soda.
Next add caustic soda solution until the colour of the solution changes from yellow to red.
Permanent hardness in water, due to the presence of gypsum or sulphate of lime in solution, may be remedied by addition of caustic soda.
The bicarbonate of sodium settles out at once as insoluble crystals, easily removed, marketable at once as such, or easily converted into simple carbonate of sodium, and further into caustic soda, as in the ordinary "old" process.
The residue boiled with caustic soda would lose all its wool, which is soluble in hot strong caustic alkali.
Examplesofcaustic soda
caustic soda
Pollution in my own area is usually caused bycausticsoda, which is used by many industries.
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One of the first stages—it has probably changed now, because this was 15 years ago—was the placing or dropping of sheets of wood pulp into acausticsodabath.
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Rather than give upcausticsodaand synthetic dye, dyers ignored the bans and continued to use both items surreptitiously.
From theCambridge English Corpus
Women responded by cutting prices and adopting new technologies (causticsodaand synthetic indigo) to reduce production costs.
From theCambridge English Corpus
In order to appreciate the significance ofcausticsoda, it is important to understand the dyeing process.
From theCambridge English Corpus
The most far-reaching initiative was the incorporation of new technologies,causticsodaand synthetic dyes, which had a dramatic impact on the dyeing industry.
From theCambridge English Corpus
In addition to allowing dyers to circumvent the obstacles to obtaining quality ingredients,causticsoda and synthetic dye helped them to increase the volume of production.
From theCambridge English Corpus
Causticsodawas also an important addition to the dyeing process because the quality of the available indigo had declined, and it had become increasingly difficult to get ashes.
From theCambridge English Corpus
Too muchcausticsodadamaged the cloths.
From theCambridge English Corpus
Presumably the chemical treatment of straw withcausticsodais referred to.
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Is not a great deal of the wastedcausticsodavaluable; and is it not required for many products needed now in medicine?
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The arrangements made under it do not affect the supply position ofcausticsodarequired for war purposes.
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Threatened with closure are altogether four plants producing chlorine andcausticsoda.
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They fail to place fail-safe systems round thecausticsodatanks, somebody leaves the valve on and as a result thousands of fish die.
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This is also true of export demands for soda ash, though some increase in exports ofcausticsodamight be possible if supplies were available.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.