| Autor: |
Lewis, David M, Broadbent, Peter J |
| Předmět: |
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| Zdroj: |
Coloration Technology; Dec2014, Vol. 130 Issue 6, p418-423, 6p |
| Abstrakt: |
In an earlier paper we have described sulphite-based resist printing using ink-jet procedures. This paper describes an alternative approach to sulphite inactivation of vinylsulphone dyes by using secondary amines to inactivate fluoro- s-triazine dyes while maintaining the reactivity of the vinylsulphone dyes. Monofluoro- s-triazine reactive dyes are padded onto cotton fabrics and then deactivated by ink-jet printing with a suitable secondary amine formulation to produce a white image on a solid ground colour after appropriate fixation and soap-off procedures have been undertaken. A coloured image can be achieved by overprinting the resist-printed areas with a coloured ink formulation containing a β-sulphatoethylsulphone-type reactive dye; such dyes form a β-bis-alkylaminoethylsulphone dye via reaction with the secondary amine. This latter dye 'unblocks' during a mildly acidic steaming process to form the reactive vinylsulphone dye, and so, unlike the monofluoro- s-triazine dye, is not deactivated towards subsequent covalent reaction with the cotton substrate. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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