With sodium sulphate, a modification of the same method is used.
sodium sulphate is principally used in the manufacture of paper.
sodium sulphate, also known as Glauber's salt, is commercially valuable, especially in the pulp and paper industries.
The numbers denote grams of sodium sulphate, calculated as anhydrous salt, dissolved by 100 grams of water.
The sale of plastered wines, containing more than two grammes of potassium, or sodium sulphate, is prohibited.
sodium sulphate, therefore, forms only one stable hydrate, the decahydrate.
With regard to sodium sulphate heptahydrate the same considerations will hold as in the case of the decahydrate.
The use of pepsin for this purpose cannot serve nature's purpose, as it contains neither sodium carbonate nor sodium sulphate.
Unhydrolyzed chromium sulphate and the sodium sulphate formed in "making basic" act also in the same sense.
An excess of sodium sulphate is to be avoided, otherwise precipitation of the colouring matter and imperfect dyeing result.