Use of Near Infrared Reflectance Analysis (NIRA) in Dye Quality Control.

Color measurement determines the conformance of samples to customer tolerances. One method of determining color deviations involves a visual comparison by a trained colorist of dyed and conditioned fabric swatches with an internal company standard. The subjectivity of the colorist's judgment, however, causes inconsistencies. The amount of..

Judgment of Color Difference on Fabric. Part 1. Consideration of the Discriminate Region in L*A*B Uniform Color Space.

A panel of expert colorists discriminated between colors on woven fabrics. The correlation coefficient between the color differences perceived by the experts and the color differences measured by colorimeters was very high. Color experts with a great deal of experience could discriminate between shades in a uniform color space more closel..

Quantification of Small Visual Color Differences.

An experiment employed the Shademaster Computer Aided Design system to assess the ability of the CMC formula (devised by the COlur Measurement Commitee of the Society of Dyers and Colourists) to measure small visual color differences. the researchers asked a group of 10 observers to judge differences in the hue, chroma, and lightness of v..

Squeegee Washing Machine.

Klieveerik recently patented a design for a squeegee machine that removes rotary screen printing pastes. Klieverik's design features vertically positioned squeegees that are arrayed over troughs leading to a slurry tank. Pressurized water pumps ensure that the squeegees are cleaned continuously within the washing chamber, which is waterti..

Festoon Steamer for Woven and Knit Fabrics.

Babcock Textilmaschinen recently introduced its Vario-Tex festoon steamer for the fixation of printing pastes on woven and knit fabrics. Babcock offers three versions: the standard Vario-Tex, which employs hot air heated to 160 degrees centigrade; the Vario-Tex LT, which employs saturated steam; and the Vario-Tex HT, which employs superhe..

New Patterning System.

The Textile Printvision patterning system applies designs directly to fabric without printing blocks, machines, tables, or pastes. Designs created on a computer aided design (CAD) system are transferred directly onto the textile by means of environmentally friendly dry print process dyestuffs. The printed fabrics have high lightfastness a..

High Performance Liquid Chromatographic Analysis of Ancient Natural Textile Dyes.

Prior to the introduction of manmade dyes, the major sources of colorants for textiles were from animals and plants. The roots, leaves, flowers stems, bark, and branches of some plants produced red, blue, and yellow dyes. Dyers extracted a red dye from some scale insects. Some sea snails provided purple and blue dyes noted in the Bible an..

Robotized Dyeing Prospects.

Automation i dyehouses can include microprocessors for automatic dyeing cycle control, PLC controllers for managing the functions of dyeing machines, devices for automatic weighting and dosing of dyestuffs and chemicals, and automatic transport and handling of materials. In Biella in 1987, Tessina completely tobotized its plant by using O..

Fully Automated Dyeing System

The Italian firm Loris Bellini recently designed a new dyeing system for worsted yarn packages. The system features computer controlled RBNV dyeing machines linked by fully roboticized internal transport network that handles the yarn packages throughout the entire manufacturing cycle. The process control unit automatically adjusts operati..

Toward the Year 2000 - The Future of Wet Processing.

After two decades of technological progress (1970s and 1980s), the wet processing industry suffered a number of setbacks resulting from global competition, the demand for smaller lots, the need for cost containment, and requirements for environmental protection. Just in Time manufacturing techniques, new methods for processing smaller lot..