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PROCESSES PREPARATORY TO DYEING-- Scouring and Bleaching of Wool............................ 15

DYEING MACHINERY AND DYEING MANIPULATIONS-- Loose Wool Dyeing, Yarn Dyeing and Piece Dyeing Machinery................................................. 40

THE PRINCIPLES AND PRACTICE OF WOOL DYEING-- Properties of Wool -- Methods of Wool Dyeing -- Groups of Dyes --Dyeing with the Direct Dyes -- Dyeing with Basic Dyes -- Dyeing with Acid Dyes -- Dyeing with Mordant Dyes -- Level Dyeing -- Blacks on Wool -- Reds on Wool -- Mordanting of Wool -- Orange Shades on Wool -- Yellow Shades on Wool -- Green Shades on Wool -- Blue Shades on Wool -- Violet Shades on Wool -- Brown Shades on Wool -- Mode Colours on Wool.................... 59

DYEING UNION FABRICS............... 168

DYEING OF GLORIA........................................... 188

OPERATIONS FOLLOWING DYEING-- Washing--Soaping--Drying................................. 197

EXPERIMENTAL DYEING AND COMPARATIVE DYE TESTING............ 211

TESTING OF THE COLOUR OF DYED FABRICS...................... 218

Fig. Page

THE WOOL FIBRE.

The skin of all animals is covered with more or less of a fibrous coat, which serves as a sort of protecting coat from the weather to the skin underneath. Two different kinds of fibres are found on animals; one is a stiff kind of fibre varying in length very much and called hairy fibres, these sometimes grow to a great length. The other class of animal fibres are the woolly fibres, short, elastic and soft; they are the most esteemed for the manufacture of textile fabrics, it is only when the hairy fibres are long that they are serviceable for this particular purpose. There is a slight difference in the structure of the two kinds of fibre, woolly fibres having a more scaly structure than hairy fibres; the latter also differ in being more cylindrical in form.


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