. A practical handbook of dyeing and calico-printing. With eleven page-plates, forty-seven specimens of dyed and printed fabrics, and thirty-eight woodcuts . ed (see plan at u), and passed over winch, e,and piled at h. They are then withdrawn from the pile, h, and threadedthe sour machine, e, soured, passed over winch el, and piled at k, where thecloth remains for three hours. It is then squeezed at u, and submitted to thewashing machine, g, whence it is delivered into the third kier, a, boiled forsix hours, again washed at g, and squeezed. It is then passed through thechemick, allowed to rema
. A practical handbook of dyeing and calico-printing. With eleven page-plates, forty-seven specimens of dyed and printed fabrics, and thirty-eight woodcuts . ed (see plan at u), and passed over winch, e,and piled at h. They are then withdrawn from the pile, h, and threadedthe sour machine, e, soured, passed over winch el, and piled at k, where thecloth remains for three hours. It is then squeezed at u, and submitted to thewashing machine, g, whence it is delivered into the third kier, a, boiled forsix hours, again washed at g, and squeezed. It is then passed through thechemick, allowed to remain in pile for one hour; again soured, squeezed, andwashed at g, again squeezed at/, and dried over the cylinders p. * s^ 56 DYEING AND CALICO PRINTING. The most important modifications of the continuous process of bleachingrecently are those patented by Mr. Barlow in 1866. This inventor combinesin one machine not only the various apparatus required for bleaching, but theoperations successively of dyeing, printing, and sizing, subdividing the troughsor cisterns containing the mordants and the dyes by cross partitions, so that the Fig. 6. u 1 i ? 1 !. several threads passing through the machine at the same time may be dyedin different colours or partly left uncoloured. These machines are, however, not adapted to the bleaching of does not possess the elasticity of cotton, and the strain would eitherpull the cloth narrow or tear it. Bleaching with other Chemical processes of bleaching with th« aid ofchlorochromic acid, chromates,chlorates, manganates, and sulphites have been from time to time introduced,but the operations have not been sufficiently successful or the use soextensive as to call for detailed description. (57) CHAPTER V. LINEN FIBRE. pHIS fibre is obtained from the stem of an animal plant called Linumusitatissimum, belonging to the natural order of the Linnee. Of whatcountry it is a native is uncertain ; but from its having been used by the
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