CHAPTER IV.

THE PRINCIPLES AND PRACTICE OF COTTON DYEING 82 (1) Direct Dyeing 85 (2) Direct Dyeing followed by Fixation with Metallic Salts 112 (3) Direct Dyeing followed by Fixation with Developers 128 (4) Direct Dyeing followed by Fixation with Couplers 139 (5) Dyeing on Tannic Mordant 147 (6) Dyeing on Metallic Mordants 156 (7) Production of Colour Direct upon Cotton Fibres 181 (8) Dyeing Cotton by Impregnation with Dye-stuff Solution 198

DYEING UNION (MIXED COTTON AND WOOL) FABRICS 208

DYEING HALF SILK (COTTON-SILK, SATIN) FABRICS 225 Method of Dyeing 225

OPERATIONS FOLLOWING DYEING 239 Washing, Soaping, Drying 239

TESTING OF THE COLOUR OF DYED FABRICS 257