Chemistry is more bio-friendly

Examples are given of the new generation of more environmentally - being dyes and pigments. They include the use of enzymes in desizing, developments in disperse dyes and reactive dyes, printing and finishing. In the near future polylactic acid (PLA) polymers will be commercialized by Corgill Dow Polymers. This corn-based polymer is produ..

Indigo production by naphthalene-degrading bacterla

B. BHUSHAN, S.K. SAMANTA AND R.K. JAIN. 2000. A wile-type naphthalene- degrading strain Pseudomonas putida RKJ1 and two recombinant strains each of Ps. putida and Eschcrichia coli carrying the genes for naphthalene degradation on a recombinant plasmid pRKJ3, produced indigo and indirubin pigments from indole. Naphthalene, salicylate and I..

Dyeing and finishing for the 21st century

The 1999 Congress of the International Federation Associations of Textile Chemists and colorists focused on technologies for the new millennium. Discussion centered around new dyes and chemicals, new machines and processes, new fibres and fabrics, and environment and energy. Higher fixation and reduced processing times were common themes.

Determination of residual substances in textiles by means of rapid extraction (German)

Determining the residual substances on textiles is important for intermediate and final inspection, but is often neglected as being too laborious and time-consuming. The availably of a new, rapid extraction method could change this situation. The method is described, taking the extraction of residual alkali and residual dye as examples. T..

Computer match prediction for fluorescent dyes by neural networks

Fluorescent dyes present difficulties for match prediction due to their variable excitation and emission characteristics, which to their variable excitation and emission characteristics, which depend on a variety of factors. An empirical approach is therefore favoured, such as that used in the artificial neural network method. In this pap..

Dyeing machine control using in-line colour measurement. Part 3 : Online dyeing quality control

A system is described that controls the dyeing process so as to produce a package within a final unlevelness tolerance in the minimum time. This is achieved by incorporation into the control algorithm a mathematical model capable of predicting the unlevelness in a dyed package from the current state of the system. The use of such a genera..

Smart rinsing: A step change in reactive dye application technology

Recent improvements in the production efficiency of the dyeing industry have been realised through a more widespread adoption of controlled coloration principles that lead to right-first-time (RFT) performance and reductions in costly and wasteful re-processing. This article focuses on the development of the rinsing process, which often t..

The theory of dyeing (and the secret of life)

This article traces the history of colour and dyes, making reference to pre-historic use of natural earth pigments. It charts the progression of dye technology from the beginning of scientific understanding and application during the Seventeenth century to the synthesis of quinine in 1856 and the discovery of the first synthetic dyestuff...

The society of dyers and colorists resource file 2000

The Resource File provides complete and up-to-date information regarding dyestuffs, equipment and services. The guide is organised into four sections ; Index; Intermediates and Ausiliaries; Colorants; and Company details. Each product or service is assigned a four-digit code, and the name of every supplier is available. The product catego..

Controlling pH in polyamide dyeing

To increase bath exhaustion and thus improve the reproducibility and levelness of dyeings, some processes allow a reduction of pH, as well as a rise in temperature. This article describes the optimisation of this type of pH sliding process. A computer program has been developed to simplify application of the systematic process recommendat..