Loss of colour in hair is due to varied reasons like genetic influence, effect of environmental factors, use of alcoholic preparations, etc. Though the permanent synthetic hair dyes are available in different colour ranges and retain natural lustre, they have the chief disadvantage of producing hypersensitive reactions in some individuals. In the present investigation various combinations of po...

From times immemorial, colorants, and flavorings have been used in foods. Color and flavor are the major attributes to the quality of a food product, affecting the appearance and acceptance of the product. As a consequence of the increased demand of natural flavoring and colorant from industries, there is a renewed interest in the research on the composition and recovery of natural food flavors...

Today, synthetic organic pigments play a major role as colorants of excellent light-fastness in artists' paints. Their analytical determination in paintings gains steady importance with respect to attribution and studio practice of certain artists as well as dating and authentication. Synthetic organic pigments have extremely varied chemical structures and properties such as colouring strength,...

Two criteria for selecting ink sets for six-color lithographic printing are discussed. The first is the volume, in CIELAB space, of an approximation of the gamut. The second is the number of pixels within a digital image (or images) whose colors are contained within the approximate gamut. In order to obtain a balance between accuracy and efficiency, the different steps in the process are priori...

The humidity-induced loss of line and edge quality in inkjet prints is due to lateral migration of the colorants within the image layer, whereas color and tone scale changes can be caused by both lateral and vertical diffusion of the colorants. The migration effects vary with colorant mixtures and ink loading. In an earlier study, we showed that ∆E measurements for solid-fill areas of color did...

Azo dyes are widely used colorants in consumer products such as leather, textiles, agriculture, cosmetics and in laboratories as indicators. This paper describes the synthesis of some novel azo dyes starting from 3-nitro salicylic acid. The synthesized dyes were investigated for their redox potentials, evaluated for their dying ability on cotton fabrics, resistivity against the fungi growth on ...