Highlights of Processing Machinery -- XIII.

Manufacturers displayed laboratory dyeing machines at ITME 2000. Exhibits included Bluemoon's glycerin bath beaker dyeing machine requiring only 5-10 grams of sample material. Cubotex's AISI 318 acid-proof machines available in atmospheric or pressurized versions, Datacolor's high speed machine with a heating rate of 5 degrees centigrade ..

Frequently Encountered Problems in Textile Wet Processing and a Diagnostic Approach for Prevention/solutions.

Trichromatic matching of dye shades reduces dye inventory and reduces the number of variables that must be monitored and controlled to ensure consistency when dyeing cotton fabrics Process related problems include substrate preparation, choice of color, vatting of colors, dyebath additives, dye to liquor ratio, and total time in the dyeat..

Frequently Encountered Problems in Textile Wet Processing and a Diagnostic Approach for Prevention/solutions.

Powder dyes used in vat dyeing on cotton must be in microfine, supra disperse, or paste form; must be prepared using a dispersing agent; and require constant stirring during padding to avoid dye separation. The padding mangle must have a shore hardness of at least 70 degree for consistent operation. Increasing the number or roll supports ..

Non-Ecofriendly Textile Processing.

Direct and reactive dyes applied to cellulosic fiber require aftertreatment to improve washfastness and lightfastness. The dyes and their most effective conventional aftertreatments generate effluent containing toxic, allergenic, and carcinogenic chemicals and metals. Effective aftertreatments for direct dyes generate effluent containing ..

Frequently Encountered problems in Textile Wet Processing and a Diagnostic Approach for prevention/Solutions.

An overview of factors that affect textile dyeing introduces the concept of color, including excitation of electrons, chromophores, auxochromic groups, bathochromic and hypsochromic shifts, and requirements of dye molecules; dyeing processes, including factors that influence dyeing and process rationalization and standardization; pretreat..

Phenomena Involving the Absorption and Reflectance of Light.

An overview of mechanisms involved in the absorption and reflectance of light addresses additive and subtractive color mixing; such organic dyes as azo dyes, cyclic and polycyclic quinones, methines, and phthalocyanines; application processes, including direct dyeing, vat dyeing, reactive dyeing, and printing; paper, leather, hair colorin..

High Performance Reactive and Disperse Dye Technology to Meet the Needs of the Globalised Textile Industry.

An overview of developments in reactive and disperse dyes and their applications addresses managements strategies, exhaust and continuous dyeing systems, the compact Palanil CC Color Map, and the ECONTROL process. BASF's Compact Palanil CC dye range comprises medium energy dyes for rapid dyeing of polyester. The ECONTROL process provides ..

Cost Savings with Production Recipe Management and Third Party Integration.

It is difficult to quantify the effects of investments on the optimization of dyeing processes. A case study of Penn Elastic, however, showed how investments in integrating software for dye recipe and process optimization can be evaluated quantitatively. Penn Elastic's goal involved a progressive automation of the dyeing process via conve..

Color AIXperts -- Innovative Solutions to 'Correct' Online Colour Communication.

Colour AIXperts GmbH's color matching system consists of the SpAIXscan camera with 16 color filters, SpAIXsoft color matching software, and SpAIXview reproduction system. The system provides accurate digital image capture, transfer, and reproduction for the textile industry and accurate online color communication between internet and intr..

Phenomena Involving a Reversible Colour Change.

Chemical reactions due to photochromism, thermochromism, ionochromism, electrochromism, and solvatochromism result in color changes in affected materials. Such photochromic compounds as spirobenzopyrans, fulgides and diarylethenes have applications in opthalmics, optical memory and switches, and the photoregulation of enzymes. Reversible ..