Silk Dyeing and Printing
topic
Silk dyeing: acid dyes (anionic dyes, pH 2-6, 85-95°C, excellent penetration and brilliance, 60% of silk dyeing), reactive dyes (covalent bonding, superior wash fastness, slightly duller shades), direct dyes (simple application, moderate fastness), and natural dyes (indigo, madder, cochineal—traditional, resurging for sustainability). Mordants: metallic salts (alum, iron, copper) for natural dyes. Printing: direct printing (pigment, acid dyes with thickeners), discharge printing (removing color creating patterns), resist techniques (batik, tie-dye, shibori), and digital printing (reactive inks, customization, 95% water reduction vs. conventional). Silk accepts dyes brilliantly due to: protein structure (many dye sites), smooth surface (even color), and high surface area (fine diameter).
Role
Silk's exceptional dye affinity and smooth surface create vivid, deep colors with luster impossible in other fibers (described as 'jewel tones'), making it preferred for high-end fashion prints and solid colors, while growth in digital printing (20-30% annually) enables short runs, customization, and sustainability (95% less water, no wastewater treatment) transforming silk printing economics and design possibilities.