Influence of Fibre Properties on Shade Variation in Dyed Fabrics.

Researchers investigating micronaire and maturity variations in cotton mixing to control color nonuniformity in dyed fabrics measured the reflectance values of dyed knit fabrics manufactured from single and mixed cotton yarns. Experiments showed that variations in the reflectance values arose from variations in dye on the fiber cross sect..

Demineralization Development

Conventional pretreatment techniques use acid demineralization to remove heavy metals from cotton knit fabric, but not from woven fabrics. Beixon Acid is a patented auxiliary product suitable for the demineralization of cotton knit fabrics. Experiments showed that is removed greater levels of alkaline earth and iron than water only demine..

Possibility of removing colour from dyebaths using a natural absorbent (Bulgarian)

A spectrophotometric study is made of the capacity of a natural absorbent to remove the colour from dyebaths when using 19 direct dyes, 20 acid dyes and 22 reactive dyes. It is found that 60-80% of the direct dyes and 30-40% of the acid dyes are absorbed.

More for less - same as alway

Manufacturers of fabric dyeing machines are always refining devices to reduce water and energy use, and more recently to cut dye cycle times in the quest for greater productivity. The 'more for less' trend is most obvious in jet and overflow piece dyeing machines. Open-width continuous fabric dyeing developments are also profiled.

New Generation of Dyeing Machines -- Current Status and Trends

The new generation of dyeing machines is notable for modular design, resulting in a high level of flexibility in operations. These high quality machines are also very reliable. Integrated systems permit automation and optimization of dyeing processes, ensuring high output. A review of the new dyeing machines examines a range of operations..

Excellence in cotton dyeing and finishing

The Cottech '98 Conference, held in Basle, Switzerland, was an opportunity for dyers and finishers to promote high quality technical presentations. This article discusses some of the innovations on view from firms such as Ciba Speciality Chemicals Inc., Dystar, FMC Corporation and Nisshinbo Industries Inc. Also discussed are the market re..

A Brief Perspective on Direct Dyeing

Direct dyes dye cellulosic fibers without the use of a mordant. Most direct dyes are azo compounds, many of which are carcinogenic. Dyes need to contain an unbroken conjugated system. In benzene, the double and single bonds alternate back and forth. The frequency of the vibration corresponds to the wavelength of light absorbed by the dye...

Some Problems Associated with Dyeing Wool-Rich Blends of Polyester

The dyeing of polyester/wool blend fabrics requires equilibrium exhaustion. Dyeing via a two bath method with the polyester dyeing occurring in the first bath achieves better shade partitioning than a one bath method. Because wool fiber takes up disperse dyes very rapidly at lower temperatures, dyeing should be initiated at higher than co..

Coloration in the Next Century.

Four research and development issues will challenge the dyeing and processing sectors into the next century: environmental pressures, innovations in coloration resulting from new fibers and fabrics, new chromophores, and improved processes developed in response to global economic pressures. Researchers will address environmental issues in..

Is High Temperature Light Fading Influenced by Photochemical Functions through Fiber Parameters?

A study investigated the influence of various fiber properties on the high temperature light fading of polyester fibers after dyeing and evaluated the fiber protection provided by ultraviolet (UV) absorbers. Tests for metamerism and high temperature indicated that the type of lighting often used in showrooms and on sales floors can cause ..