Eco-Friendly Processing of Cotton: Application to Industrial manufacturing.

Environmental advantages of cotton include its biodegradability and renewability, but processing uses high levels of energy and chemicals. Kurabo Industries is researching new technologies that eliminate sodium hydroxide, chlorine compounds, and formalin; reduce the quantity of water and phosphate consumed; and reduce the quantity of carb..

Accurate White Measurements with Spectrophotometers

Consistently high whiteness is a quality parameter important in the manufacture of various knit fabrics. Advances in the brightening process and quality control systems have increased the reproducibility of whiteness factors. As whiteness capacities and the demand for whiteness as a quality parameter have increased, the need for improved ..

Aftertreatment of Polyester Fabric Dyed with Temporaily Solubilised Disperse Dyes

High pressure liquid chromatography established the effects of sodium sulfite and sodium bisulfite washing agents on the conversion of unexhausted disperse dyes derived from aminopheyl-4-(B-sulfatoethylsulfone). Dyeing on polyester fibers exhausted the dyes primarily in the vinylsulfone form with some hydroxyethylsulfone analogs. The sulf..

Dye Decolorization by Peroxides, Polyoxometallates, and Laccases

A study of the dye degradation of different catalytic systems compared the effects of peroxides, polyoxometallates, and laccases on the model dyes Indigo Carmine and Solophenil Blue GL. Decolorization totaled 15 percent for laccase or polyoxometallate. A mixed system produced decolorization of up to 65 percent. Data confirmed the essentia..

Dyeing and Finishing of Textiles : Basics and Troubleshooting.

A workshop sponsored by the American Association of Textile Chemists and Colorists on the dyeing and finishing of textiles featured presentations titled Basics of Dyeing - Tutorial; Dyeing of Cellulosic Fibers; Dyeing with Disperse Dyes; Dyeing with Pigments; Batch Dyeing Considerations for Blends; Dyeing Fiber Blends - Continuous; Influe..

Quality Assurance and Reduction in Costs by Process Control

Then Maschinen & Apparatebau GmbH's Comat dyeing machine features the Dynamic Quality Control System software for automatic adjustment and control of such dyeing process parameters as fabric speed, differential pressure, and metering. The Then TDS system facilitates chemical formulation and optimization of physical parameters by calculati..

Controlling Dye Migration in a Fabric Capillary Network

Uncontrolled dye migrationin fabric causes streakes, faded areas, and uneven shade depth. Researchers evaluated a combination of borax and polyvinyl alcohol (PVA) as an antimigration agnet for reactive reactive dyes for polyester/cotton blend fabrics. Increasing borax and PVA concentrations decreased the percentage of dye migration. Forty..

Prevention of Defects in Wool Dyeing and Its Relationship with Preparation and Finishing Operations

Wool dyeing conventionally uses acid or premetallized dyes. Within these dye families exist a range of products with different dyeing and fastness properties, requiring optimization of the dye recipe and operations depending on specifications. Process optimization decreases dyeing defects and improves downstream processability. A review o..

Expert System for Colour Matching

Ciba Specialty Chemicals' COLPOCA software helps dyeing and printing plants translate shades into recipes, select the correct dyes and dye combinations, and link sampling to manufacturing. Regardless of fiber mixture or color, COLPOCA supplies one recipe of up to three components. The recipe is based on shade and selection criteria, inclu..

Biological process for decomposing effluent dyestuffs

Dye residues in textile finishing industry effluent are not adequately removed by standard biological sewage treatment plants. The authors report the development of a multi-stage process, the most innovative aspect being the introduction of an acidogenic-anaerobic preliminary stage. Different effluents have been successfully clarified on ..