Textile school catalog, 1909-1910 . tudy of thechemical conditions; of the physical conditions.—Different types of mercer-izing machines.—Various effects to be obtained in mercerizing; craping and 95 COURSES IN CHEMISTRY, DYEING AND PRINTING lustering.—Merctrizing yarn and piece goods.—Effect of mercerizing on thefibre; strength, elasticity, etc.—Discussion of patents relative to merceiizing.—Testing of mercerized goods.—Difficulties encountered in dyeing mercerizedcotton.—Dyes most suitable to be employed.—Preparation of various shadeson mercerized yarns and cloth.—Dyeing of wool and silk mat
Textile school catalog, 1909-1910 . tudy of thechemical conditions; of the physical conditions.—Different types of mercer-izing machines.—Various effects to be obtained in mercerizing; craping and 95 COURSES IN CHEMISTRY, DYEING AND PRINTING lustering.—Merctrizing yarn and piece goods.—Effect of mercerizing on thefibre; strength, elasticity, etc.—Discussion of patents relative to merceiizing.—Testing of mercerized goods.—Difficulties encountered in dyeing mercerizedcotton.—Dyes most suitable to be employed.—Preparation of various shadeson mercerized yarns and cloth.—Dyeing of wool and silk material containingmercerized effects.—Finishing and scrooping of mercerized goods. There is no better example of the influence of chemistry on tex-tile industries than to be found m the discovery and development ofmercerizing, whereby a new and valuable product was laid at thedisposal of the manufacturer. The chemical principles of the processare thoroughly explained to the student, who is also required to carry. PRINTING LABORATORV. out experiments to illustrate the method, and thus become familiarwith the proper working conditions. The relation of mercerizing todyeing is also taken up, and the dififerences in the dyeing of mercer-ized and ordinary cotton are thoroughly studied. DYEING VII. Textile Printing Differences between printing and dyeing.—The essential elements inprinting.—The machine; study of its different parts.—The different thickeningagents used in printing pastes; study of their different properties and values.—Methods of preparing and mixing pastes.—Comparison of the differentstyles in printing.—The pigment style; nature of pigments used, and themethods of preparing the color paste; methods of aftertreating and fixing.—The direct printing style; use of substantive dyes, and the preparation oftheir color pastes.—Steam style with basic colors; methods of fixing.—Mordantstyle; use of alizarine colors and natural dyewoods.—De
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