. Textile school catalog, 1917-1918. different styles in print-ing.—The jiigment style.—The direct printing style.—Steam style with basiccolors.—Mordant style.—.iline black —Developed style with diazo-tized colors.—Printing of indigo and other vaf dyes.—Resist style.—Dischargestyle; white and colored discharges. There is a larger mmiber and greater variety of chemicals andchemical processes used in printing than there is in dyeing, and it isthe object of this course to give the student the underlying prin-ciples of the difierent methods of printing. The printing laboratoryof the sch
. Textile school catalog, 1917-1918. different styles in print-ing.—The jiigment style.—The direct printing style.—Steam style with basiccolors.—Mordant style.—.iline black —Developed style with diazo-tized colors.—Printing of indigo and other vaf dyes.—Resist style.—Dischargestyle; white and colored discharges. There is a larger mmiber and greater variety of chemicals andchemical processes used in printing than there is in dyeing, and it isthe object of this course to give the student the underlying prin-ciples of the difierent methods of printing. The printing laboratoryof the school is furnished with two experimental iirinting machinesand a number of engraved rollers adapted to the various styles of 91 COURSE IX CHEMISTRY, DYEIXG AND PRINTING printing. The course consists of an extensive scries of lectures andconsiderable laboratory work in the preparation of different coloredpatterns illustrating the different styles and methods in vogue andthe use of the different classes of PRIXTIXG LABORATORY. DYEING VIII. Principles of Dyeing; Advanced Course Developed Dyes; Indigo and other Vat-dyes ; Aniline Black; Turkey Red; Silk Dyeing and Weighting; Resist Dyeing; Preparation of Pigment Lakes ; Methods of Softening, Scrooping and Weigliting Cottons; Methods of Waterproofing The chemistry of the developed dyes; study of the dyeing, diazotizingand developing processes.—Coupled colors.—The naphthol colors.—History ofindigo dyeing; methods of extraction and preparation of the dyestuff.—Thechemical principles of indigo dyeing.—Methods of dyeing cotton with indigo;of dyeing wool.—Comparison of natural indigo with the synthetic product.—Preparation and use of indigo extract.—Yat dyes other than indigo.—Thechemical princii)les involved in the dyeing of aniline lilack.—(.^ne-I)ath black:steam and aged blacks.—The chemical principles of Turkey-red dyeing.—Comparison of old process and new process Turkey red. Applic
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