326

DYEING AND CALICO PRINTING.

Madder.

kilos, of carbonate of potassa; second clearing, under pressure, with 6*5 kilos,of soap and o‘375 grm. tin-salt; next, third clearing the same as second ;and next a bran-bath. The reader will readily observe that in the process ashere described the oiled goods are not exposed to the bleach-field, and it istherefore apparent that the adtion of light can be replaced by that of heat.The oiled goods are sometimes heaped together in a room heated to 35 0 , carebeing taken to move the goods about so as to prevent their spontaneous com-bustion by a too adtive oxidation of the oil.

Turkey-reds are very readily recognised by the peculiar fiery and deep toneof the colour, but if there is any doubt on this subjedt it is only necessary toimmerse the piece to be tested, for a few moments, in a boiling solution of

Artificial Alizarin.