| 单词 | azo dye |
| 例句 | But some of the chemicals involved, such as azo dyes, contain materials linked to cancer and other harmful effects. A Butterfly’s Brilliant Blue Wings Lead to Less Toxic Paint 2020-11-13T05:00:00Z They include aniline black, a permanent black produced by the oxidation of aniline, and the ice colours, which are azo dyes derived from certain coal-tar products containing nitrogen. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z In this manner a new azo dye is produced upon the fibre, which differs from the original one not only in colour, but also by being faster to washing and other influences. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z Then there are some members of the azo dyes, particularly the croceine scarlets, which can also be dyed on the cotton by the aid of tin, lead or alum mordants. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student The simple azo dyes are combinations of two or more organic bases, united together by a peculiar and characteristic group of nitrogen atoms. The Dyeing of Woollen Fabrics This was again carried out in the azo colour shed, with no more modification than that involved in passing, from one azo dye to another. The Riddle of the Rhine; chemical strategy in peace and war In the preparation of the azo dyes the starting-point is a primary amine; the amino group is 'diazotized', i.e. treated with a solution of sodium nitrite and dilute mineral acid at low temperature. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Diazo compounds are therefore important intermediate substances in the manufacture of azo dyes. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z The vast majority belong to the group of azo dyes, which can be employed to dye from palest pinks to the deepest crimson reds. The Dyeing of Woollen Fabrics |
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