PARIJATAKA -- A GOOD SOURCE OF DYE FOR WOOLENS.

Processes for dyeing wool with Parijataka flower dye are examined. Parijataka is a jasmine-like shrub or small tree belonging to the olive family. It is cultivated throughout India. The bright orange flowers contain a coloring matter called nyctanthin. Optimum conditions for dye extraction, dye concentration, mordant concentration, and th..

PHENOMENON OF THERMOMIGRATION -- CAUSES AND COUNTERMEASURES.

Thermomigration in polyeser fabrics and its blends dyed with disperse dyes is a problem during finishing processes that use heat. The causes of thermomigration are complex and can include many processing parameters, such as temperature, blend ratio, and auxiliaries. A variety of tests can be used to predict the probability of thermomigrat..

EFFECT OF PHYSICO-CHEMICAL METHODS OF ACTIVATION ON THE STRUCTURE AND DYEABILITY OF TEXTILE MATERIALS MADE FROM MANMADE FIBERS.

Physico-chemical methods are used to activate manmade fibers for dyeing. These methods increase the accessibility of the molecule to dyes by weakening intermolecular bonds. Microwave, ultrasound, or magnetic radiation, heat, and/or solvents are used. By combining these activators, dyeability can be increased at lower temperatures and with..

INFLUENCE OF ALKALI PRETREATMENTS ON THE DYEING OF COTTON WITH CIBACRON BRILLIANT ORANGE 2G-E.

Treatment of 100 percent cotton fabric with alkaline reagents at room temperature showed significant increases in percentage area shrinkage with increasing alkali concentration. The reagents used were Na2SiO3, NH4OH, KOH, and NaOH. For each reagent, the area shrinkage decreased with increasing temperature of treatment. Dye fixation measur..

OPTICAL BRIGHTENERS -- PROPERTIES AND APPLICATIONS.

The chemical structure, chemical action, and physical properties of optical brightening agents are described. Optical brightening of polyesters, polyolefins, polyacrylonitrile, polyamides, polyurethanes, cellulosics, and plastics is discussed. The application of optical brightening agents to a new screen printing process and to analytical..

Dornier finishing machines for circular knitted fabric

Lindauer Dornier GmbH has 50 years of experience in the design and manufacture of textile finishing machines. In 1979, in cooperation with Terlinden, Switzerland, they launched the first continuous tubular knit mercerisation machine with patented circular spreader. The range of products now includes a mudular combined mercerising-bleachin..

Use of Cyclodextrins for Improving Waste Air Washers.

To improve waste air purification processes, reserchers tested the effectivenes of cyclodextrings as a chemical aid. Experiments involved laboratory scale machines that separate orgainc material from the gas pahse. A. Hewlet Packard GC 5890 series 11 plus and a MSD 5972 gas chromatorgraph determined the concentration of such organic subst..

A Study of the Colour Differences that Occur When Recycling Waste Waters from Pad-Batch Reactive Dyeing

Experiments on color differences in recycled wastewater from pad-batch reactive dyeing involved dyeing a sample of 100 percent cotton fabric with C.I. Reactive Red 45, C.I. Reactive Black 8, C.I. Reactive Orange 3, and C.I. Reactive Yellow 3 at 10 grams per liter of dye, 10 grams per liter of sodium hydroxide, and 25 grams per liter of so..

Biological Renovation and Reuse of Spent Reactive Dyebaths

The objective of research on the biological renovation and reuse of spent reactive dyebaths is to evaluate the performance of anaerobic/anoxic biological treatments and a low cost fixed film bioreactor system as decolorization and reuse technologies. Experiments involved the study of nine commercial reactive dyes (Black 5; Blue 4, 7, and ..

Innovative Spirit.

ColorService exhibited the first automatic dispensing systm for powder dyes at ITMA 1987. The system has evolved since its introduction to include more applications and integration with a greater variety of finishing systems. The company developed global computer software systems to automate further its dispensing systems. The company is ..