. Textile school catalog, 1916-1917 . nt-ing.—The pigment style.—The direct printing style.—Steam style with basiccolors.—Mordant style.—^Aniline black printing.—Developed style withdiazotized colors.—Printing of indigo and other vat dyes.—Resist style.—Discharge style; white and colored discharges.—Wool and silk printing. There is a larger number 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 different methods of printing. The printing laboratoryof the sch
. Textile school catalog, 1916-1917 . nt-ing.—The pigment style.—The direct printing style.—Steam style with basiccolors.—Mordant style.—^Aniline black printing.—Developed style withdiazotized colors.—Printing of indigo and other vat dyes.—Resist style.—Discharge style; white and colored discharges.—Wool and silk printing. There is a larger number 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 different methods of printing. The printing laboratoryof the school is furnished with two experimental printing machinesand a number of engraved rollers adapted to the various styles of 91 couRSR IN che;mistry, dyeing and printing printing. The course consists of an extensive series 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 PRIMIXG LABORATORY. DYEING VIII. Principles of Dyeing ; Advanced Course Developed Dyes; Indigo and otiier Vat=dyes; Aniline Blaclt; Turkey Red; Sill< Dyeing and Weighting; Resist Dyeing; Preparation of Pigment Lakes; Methods of Softening, Scrooping and Weighting Cottons; Methods of Waterproofing The chemistry of the developed dyes; study of the dyeing, diazotizingand developing process.—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.—Vat dyes other than indigo.—Thechemical principles involved in the dyeing of aniline black.—One-bath black;steam and aged blacks.—The chemical principles of Turkey-red dyeing.—Comparison of old process and new process Turkey red. Applica
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