WebMay 5, 2016 · Dyes and pigments are the most important colorants used to add a color or to change the color of something. A dye must be soluble in the application medium, usually water, at some points during the coloration process. It will also usually exhibit some substantivity for the material being dyed and be absorbed from the aqueous solution. WebDyes may be classified according to their chemical structure or by the method by which they are applied to the substrate. The dye manufacturers and dye chemists prefer the former …

(PDF) Structure and Properties of Dyes and Pigments - ResearchGate

WebSep 4, 2014 · 3. GENERAL INTRODUCTION TO THE CHEMISTRY OF DYES Dyes possess colour because 1) Absorb light in the visible spectrum (400–700 nm) 2) Have at … Webdye, substance used to impart colour to textiles, paper, leather, and other materials such that the colouring is not readily altered by washing, heat, light, or other factors to which the material is likely to be exposed. Dyes … star trek ship stl files

Textile Dyes: Dyeing Process and Environmental Impact

WebA dye is a colored substance that chemically bonds to the substrate to which it is being applied. This distinguishes dyes from pigments which do not chemically bind to the material they color. Dye is generally applied in an aqueous solution and may require a mordant to improve the fastness of the dye on the fiber.. The majority of natural dyes are derived … WebThe azo-dye moiety in each is derived from H-acid. Although azo chromogens are most commonly used (about 80 percent of the time), reactive dyes can contain almost any chromogen; thus, a vast array of colours is available. With the introduction of reactive dyes, cotton could finally be dyed in bright shades with monoazo dyes for yellows to … Webinterest in natural dyes during the last decades of the twentieth century. Textiles colored with natural dyes are preferred by environmentally conscious consumers and today … star trek ship tabletop miniatures