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작성자 Merle
댓글 0건 조회 92회 작성일 24-10-13 11:54

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Subsequently potash and later on soda was substituted for the cows’ dung, whereas sour milk was replaced by sulphuric acid. 9) Sour in sulphuric acid. 6) Sour in sulphuric acid. 3) Bitter in sulphuric acid. Since the individual fibres are very brief, the entire removing of the latter would be attended by a disintegration of the material. If, however, the cotton must be subsequently dyed with direct cotton colours (see Dyeing), the presence of oxycellulose might result in uneven dyeing.

Its detection could also be effected by dyeing a sample of the bleached cotton in a chilly, very dilute answer of methylene blue for about ten minutes, when any parts of the fabric by which the cellulose has been transformed into oxycellulose will assume a darker color than the rest. The blueing may either be effected by dyeing or tinting with a colouring matter like Victoria blue 4R or nohio.org acid violet, or by treatment in wash stocks with a suspension of ultramarine in weak soap until the colour is uniformly distributed throughout the material.

Wool bleached with sulphurous acid or bisulphite is readily affected by alkalis, the pure yellow colour returning on washing with cleaning soap or soda. As a rule the free acid might be detected by extracting the tendered materials with distilled water and adding to the extract a drop of methyl orange solution, when the latter will turn pink if free acid be current. Trust me once i say you will be napping shortly after that.

It is of the best significance that the products needs to be evenly packed, for, if channels or loosely-packed places are left, eng.worthword.com the liquor circulating through the kier, when boiling is subsequently in progress, will comply with the road of least resistance, and the result's an uneven therapy. For velveteens, corduroys, heavy drills, https://www.vapeenter.com/eleaf-tessera-150w-with-ello-ts-tc-kit-3400mah pocketings and different fabrics wherein creasing must be avoided as a lot as possible, the so-called " open bleach " is resorted to, which differs from the ordinary process chiefly in that the goods are handled throughout at full width.

Gas singeing can also be used for plain items, and being cleaner and beneath better management has largely replaced plate singeing.

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