Color Discrimination Results from a CRT Device: Influence of Luminance

A study investigating the weighting function for lightness adopted by the CIE94 color difference model calculated new color discrimination ellipsoids from two normal observers using a CRT device and five luminance values at each of the five centers recommended by the CIE in 1978. Although some of the experimental conditions did not fit th..

Color Reproduction and the Naturalness Constraint

An investigation into the process underlying the subjective impressions of the fidelity of the colors of reproduced objects focused on the concept of a naturalness constraint and a framework for specification of naturalness judgments. The naturalness assessment of reproduced object colors is similar to prototypical object colors and chara..

Hue Scale Adjustment Derived from the Munsell System

Researchers determined hue scale adjustment factors for CIELab using the Munsell system. The adjustment factors varied significantly as a function of hue angle. A formula based on the 2(o) observer color matching functions that models the chroma scale of the Munsell system was more accurate than was CIELab using the same opponent color re..

Effects of heat temperature in dyeing and finishing on the physical properties of polyester fabrics

This research surveys effects of wet and dry heat temperatures in sizing, scouring, pre-set and final set processes on the thermal shrinkage of the polyester fabrics. Used polyester filament for warp is 50D/24fil spark and 75D/72fil semi-dull for weft yarn. Plain fabrics were woven by shuttle weaving machine. Satin fabrics were woven by w..

Recommended weightings for colorimetric calculations

Several different sets of weighting functions are, or have been, in routine use in colour-measurement system employed in industry to represent the same pairing of illuminant and observer. Exactly the same inputs to different weight-set purporting to represent the same pairing give, often significantly, different output (e.g.colour-differe..

Chemical modification of cellulose for dyeing with disperse dyes

The author in this article has modified cotton fabric by treatment with chlorodiethylaminoethane hydrochloride with a view to introducing basic tertiary amino groups on the cellulose backbone. Such modified cotton has been found to be receptive to disperse dyes during dyeing, dyed fabrics show low light and wash fastness, and can be made ..

A novel approach for improving the light fatigue resistance of spiropyrans

Photochromic behaviour is a common characteristic in spiropyrans and spiro-oxazines as well as other photochromic materials. From a commercial point of view, the fatigue resistance of these compounds is the key property that largely determines whether they are likely to find any practical application. Various potential metal complexes wer..

Rope drive in piece dyeing machines

Explains the principles behind the Krantz Aero-dye machbine, which is capable of transporting even heavy materials reliably and sufficiently fast, with eonly a minimal risk of rubbing and excellent field deposition. This air-only drive is particularly useful with tension sensitive fabrics.

New Washing and Treatment Compartment Improves Cost-Effectiveness and Fabric Quality.

The Babcock Power Tex open width washing machine improves fastness results during the washing of dyed and printed fabrics at production speeds of over 100 meters per minute. Its intensive washing and treatment compartment accommodates desizing of water soluble synthetic sizes and native and mixed sizes for oxidative/enzymatic degradation,..

Anthraquinone blue disperse dyes containing a built-in stabiliser

This paper describes the synthesis and properties of anthraquinone disperse blue dyes in which a benzophenone, benzotriazole or hindered amine stabilizer has been incorporated into a commerical (protype) dye structure. Although the lightfastness of the dyes containing a 'built-in' stabilizer generally possessed better sublimation fastness..