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bleaching, esparto
Значение термина bleaching, esparto в knolik
bleaching, esparto - Bleaching, Esparto
bleaching, esparto - Esparto pulp for paper-making is bleached in the poacher by means of a solution of bleaching powder. Some manufacturers hasten the process by adding a little hydrochloric or sulphuric acid; others steam-heat the mass to about 90 ° F. (32 ° C.); others put in a small quantity of soda bicarbonate. The quantity of bleaching-powder necessary depends on the quality of the grass and the degree of boiling: 12 lb. per cwt. of esparto is a fair average. After being about 2 hours in the poacher, the almost white pulp is drained in large chests for 8 hours or longer, exposed to the action of light, and finally pressed to remove the excess of liquor.
Рядом со словом bleaching, esparto в knolik
| bleaching, cotton | В начало буква "" буквосочетание "" | bleaching, fats and grease |
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