DM 120 1st Edition Lecture 14 Outline of Last Lecture Exam 3 Outline of Current Lecture Textile Dyeing Color Import Classes of Dyeing Color Formulation Key Everything that are now highlighted are things that will then appear on the test Current Lecture Textile Dyeing Color Had important characteristics that produce apparel and fastness with good performance History Started with using natural sources Plants insects minerals 1856 First synthetic dye was used Level textile with same hue value intensity Colorant describes the dyeing and pigments that color adds Coloration the process adding color Colorfastness dyes and prints that do not fade Dyeing Requires water and binds dye to textiles chemical reaction occurs Depth of shade darkness or lightness of color a Measured in sab stance ratio Weight of fiber Quantity of dye Pigment microscopic colored particles held together on surface by binding agent not a dye and doesn t combine with textile insoluble in water Classes of Dyeing Affinity dye capable of combining with fabric Direct used for cellulosic fiber makes bright colors has a lot of coverage Acid Wool nylon rayon widely used for silk bright colors good dry cleaning Fiber Reactive Cellulosic proteins poor resistance to chlorine Vat Cotton solubility cycle dyeing big process produces duel colors Disperse used on synthetics good color fastness poor quality on acetate Natural Dyeing Minor dying plants animals minerals used on cellulosic proteins nylon Color Formulation Lab Dip sample swatch of fished dye Standard what the finished order should look like Dye lot new batch Color management system helps maintain color and shade consistency Vocab Mesmerism two colors match under one light condition but look different in another Bezold Effect when two or more colors merge into a new color Dyeing Stages Solution Dyeing add color pigments to spinning solution color is part of fabric Gel Dyeing color incorporated before fiber Stock Fiber Dyeing Dye added to loose staple fabric dyed before yarn processing with heavy effect Yarn Dyeing dyed before woven or knit dint fabric limited to single design More expensive to yarn dye than single pieces