INDUSTRY|leather and textile industries|textile industry
- ruaimeachán díreach Reference "Rialacháin (AE) Uimh. 374/2014 maidir le dleachtanna custaim ar earraí de thionscnamh na hÚcráine a laghdú nó a dhíchur,CELEX:32014R0374/GA Faomhadh an téarma seo mar chuid de Thionscadal Lex"
- ga
- ruaim dhíreach Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- direct dye | direct dyestuff | substantive dye | substantive dyestuff
- en
- Definition dye that colours the substrate after a chemical reaction takes place with the fibre to form Van der Waals and other short-range forces between the fibre and the dye Reference "COM-Terminology Coordination, based on: European Commission. JRC. European IPPC Bureau. 'Best Available Techniques (BAT) Reference Document for the Textiles Industry' (9.9.2022). Publications Office of the European Union, Luxembourg, 2022"
- Comment "1) In contast to 'reactive dyes' which form a covalent bond between the fibre and the dye. 2) Direct dyes (also called substantive dyes) can be azo compounds, stilbenes, oxazines, or phtalocyanines. They always contain solubilising groups (mainly sulphonic acid groups, but carboxylic and hydroxyl groups can also be found) that ionise in aqueous solution. Direct dyes are characterised by long planar molecular structures that allow these molecules to align with the flat cellulose macromolecules, the dye molecules being held in place mainly through Van der Waals forces and hydrogen bonds"