100 years of synthetic indigo

It is exactly 100 years since BASF launched the synthetic form of indigo, as Indigo rein BASF. The paper traces the research work involved in the race to be the first to synthesize indigo, highlighting the breakthrough when an industrially practicable way of making phenylglycine from naphthalene was found. It provides details on BASF's co..

Complete biodergradation of the azo dye axodisalicylate under anaerobic conditions

Azo dyes are a widespread class of poorly biodegradable industrial pollutants. In anaerobic environments, azo bonds are reductively cleaved yielding carcinogenic aromatic amines, many of which are assumed to resist further metabolism by anaerobes. Here we

Color tone and fastness of chitosan adhered tussah silk fabric dyed with various dyes (Japanese)

Chitosan adhered tussah silk fabrics were dyed with various dyes. The effect of chitosan on the dyeing affinity, color difference and color fastness in chitosan adhered tussah silk fabric was examined. The dyeing affinity was greatly increased by direct d

Kinetics in the dyeing of polyamide (nylon) fibre - anionic (acid) dye in presence of surfactants

In this study the action of various surfactants on the initial rate of dyeing nylon fabric are investigated. The effect of various surfactants are observed on three different acid dyes. It was found that nylon fibre dyeing with acid dye requires initial rate of control to obtain level dyeing. Various surfactants can be added in the dyebat..

Ultrasonic treatment of polyester with sodium hydroxide and dyeing

The polyester fabric is treated with sodium hydroxide with concentrations of 2.5％, 5.0％, 7,5％ and 10.0％ for 10 minutes and its multiples upto 60 minutes, and dyed with disperse dye at 1％ shade in the presence of ultrasonic energy. At this concentration and duration of the sodium hydroxide treatment on polyester fabric there is no sig..

Processing and Reuse of Dyehouse Wastewater.

A study examined the combination of ozone and ultraviolet light with hydrogen peroxide to facilitate processing and recycling of dyeing plant wastewater. Researchers treated textile effluents and manmade fiber dyebaths with various advanced oxidation proc

An Investigation of On-Line Quality Monitoring Systems in Predicting the Quality of Textured Yarns and Comparison with the Standard Knit-Dye Quality Control Procedure.

The quality of textured yarns is currently measured by the knit-dye quality control procedure. In this procedure, the last 100 meters of yarn or less on a package are knitted into a sock, dyed, and then graded. Packages are passed or rejected by comparing

Odor Removal by Ozone.

Ozone based odor removal services provide professional drycleaners with a cost effective method for diversifying their operations and improving customer services. Conventional ozone generators are approximately 24 inches wide, 9 inches high, and 22 inches deep. They pump ozone through an enclosed area in which apparel items are hung a min..

Solvent and Ultrasonic Alternatives to Perchloroethylene Dry-Cleaning of Textiles.

Recent research suggests that nontoxic environmentally friendly drycleaning solvents or aqueous based cleaning systems, alone or in conjunction with ultrasound, can serve as effective alternativesn to perchloroethylent. An experiment compared the followin

An Investigation of the Mechanisms Causing Tendering of 100

Reactive tendering refers to the degradation of 100 percent cotton dyed yarns that occurs after repeated commercial laundering processes. Previous research on vat and reactive dyes has found that the problem of tendering is due to the acid hydrolysis of c