Farrell, Frank J. (Frank James), 1877-1937 · London : Charles Griffin & Co. · leaf 191
177 SPECIAL METHODS. and the black is developed in a 30 per cent, solution of hydrogen peroxide. Feathers are sometimes dyed in graduating shades, beginning at one end with a very pale shade and finishing in a dark shade of the same colour. Two methods are employed in the produc- tion of these… … Fig. 49. — Feather Starching Machine. and the whole feather is dyed a pale shade ; the bath is then slightly strengthened and three-quarters of the length of the feather is dipped in it, and so on, gradually strengthening the bath and then immersing less of the feather, until only the end is dyed…
