II. Iron Black.—Lay down the feathers over night in a warm bath, in which one hundred per cent., of the weight of feathers, soda crystals have been dissolved. On the following day take them up, squeeze them out and lay them down for two hours in a proportionally strong solution of carbonate of ammonia, take them up and rinse well in warm water. Lay down for six hours upon a bath of nitrate of iron 10° B.; take up, rinse, and dye at 170° F. with the decoction of ten per cent. logwood in which five per cent. Marseilles soap has been dissolved. If a dead black is wanted, add some decoction of quercitron or turmeric to the bath. The desired depth being obtained, lift, rinse, starch and dry. In case the color is over-dyed, strip with sodium chloride (or sulphuric acid) 2° B., as above described, drain, squeeze and dry.
III. Logwood Black.—Scour and rinse the feathers well. Prepare a bath with three per cent., of the weight of feathers, carbonate of lime, six per cent. blue stone, and five per cent. tartar. Enter the feathers at 170° F., maintain this temperature for one hour; then let it go down, but leave the feathers in the bath for six hours longer, agitating them frequently during that time. Take them up, drain and squeeze, or centrifugate, and enter a handwarm bath containing some decoction of logwood, to which some decoction of fustic is added. Work for fifteen or twenty minutes, then raise the temperature to nearly boiling heat. Continue adding decoction of logwood, until a nourished black is obtained. This dye being hard to correct by the ordinary means, the additions of logwood decoction must be made with caution towards the end of the operation, in order to prevent over-dyeing. If a brownish touch is desired, add some more decoction of fustic when the black is nearly done. Then lift, rinse, starch and dry as usual under continual agitation, beating and shaking of the feathers. This chrome black is superior to iron black, because it imparts, to the ostrich feathers, more lustre.
IV. Whatever kind of feathers are to be dyed, white, grays or old blacks, wash them perfectly clean in two or three warm soap baths and remove the soap by rinsing in two or three warm and several cold waters. Colored feathers which are to be redyed blacks must be stripped of their color as much as possible by washing in hot soap to which some ammonia is added, whereupon this must be rinsed in several waters absolutely clear from soap and alkali; it is an erroneous notion to neutralize the last trace of alkali which may remain, by a passage through a feeble acid bath. The feathers thus prepared for dyeing, make a bath of two parts nitrate of iron to one part hot water at 170° F., enter the feathers, work them through a few times, and then lay them down in the bath for twelve hours (over night). Then lift and rinse the feathers in several (three or four) cold waters Prepare a pretty strong decoction of logwood and fustic, for which take two parts of the former to one part of the latter; let the temperature go down to about 208-210° F., when enter the feathers and maintain that temperature for fifteen or twenty minutes. Then shut off the steam or remove the dye-vessel from the fire, as the case may be, and let the feathers cool in the bath. When cold take them out, prepare a fresh bath of logwood and fustic like the first, enter the feathers at 208-210° F., after fifteen or twenty minutes add about a teaspoonful of copperas for one gallon of water, and leave the feathers in the bath for six or eight hours longer; then lift and rinse in several cold waters. The feathers are at this stage black with a strong brown touch which is removed by a cleaning bath of Eau de Javelle (sodium chloride). The latter is prepared by rubbing one-quarter pound chloride of lime to a smooth milk with a little cold water (in a porcelain or a marble mortar) and adding this milk to the solution of one-half pound Glauber salt in three parts water. After good stirring the mixture is then allowed to settle, when the clear solution is poured off and put up for use in well stoppered bottles. Of this liquid so much is added to a basin or pan full of warm water that it gives a slippery feel between the fingers, similar to that of a solution of soda.
In this bath the feathers are agitated for six or eight minutes, or until the liquid has assumed a yellowish color. Then the feathers are taken out, rinse in two or three warm waters, passed through raw starch, pressed out between several laps of a clean piece of muslin, and dried either by rubbing them in pulverized and sifted potato starch or by shaking them before an open fire or gas-flame.
The nitrate of iron bath can be preserved and used for the same purpose for eight or ten days, but the first logwood bath becomes useless and is let out. As above observed (I) sulphuric acid can also be employed for correcting the over-dyed feathers and reducing that brownish color to a pure lustrous black, but a much shorter passage is given: the feathers are entered by single strings, well opened, agitated in the sulphuric acid bath for a few seconds, and immediately rinsed. Where week work is done, it is advisable to have two men employed at this operation, one of whom passes the feathers in the acid bath and hands them over to the other man for rinsing.
CONTRASTS AND SHADINGS, OR OMBREES.
Fashion and fancy sometimes requires the dyer of ostrich feathers to dye upon one feather two, or even three contrasting colors, or different shades of the same color, that is, the tips of the feathers in another color or shade than that of the lower part of the feather. Generally in these combinations the tip is dyed the lighter color or shade, and the lower part considerably deeper or in a heavier color. Very popular combinations are: the tip light blue and the bottom brown, the tip rose and the lower part bordeaux, the tip light orange or dark yellow and the lower part garnet brown, tip rose with olive bottom part, or even three colors, such as the tip rose, the part below it medium olive green, and the lowest part deep violet. That such combinations are very handsome cannot be asserted; but fashion dictates, and fancy sometimes prefers oddity to beauty. More rational are at any rate the ombrées, or combinations of two or three shades of the same color upon one feather. The operation is the same for both styles; but contrasts are generally dyed only upon single feathers, while ombrées, being in greater demand, are dyed by strings or even in greater lots. The feathers being scoured and rinsed as usual, are first dyed wholly in the lightest color or shade to be produced, according to recipe, say light blue for the tip, and dried. Then wrap the top, as far as it is to be light blue, in paper (some dyers use for this purpose oiled or waxed paper) and tie the paper firmly, but not so hard as to injure the feather, with a string, not so loosely as to allow the paper envelope to slip out of place during the manipulation. Then, holding the feathers by the top, dip them into the boiling hot bath for the other color, or shade, to be dyed, but only so deep that the paper just touches the surface of the dye-liquid. This method is the safest for learners or new beginners. For more experienced workers it is unnecessary to use the paper wrapping; they simply first dye the light bottom shade, dry or not, according to the characters of the two colors (for shadings, half-dry feathers, that is, drained and squeezed out, are rather preferable), and loosely hold them in the bath for the second color, or deeper shade. They have it thereby in their power to effect a more gradual transition from one color or shade to the other. As the color becomes deeper, the longer the feather is immersed in the bath, it is plain that the dyer can easily produce upon one feather a complete graduated scale of shades. Each time, after a shade has been dyed to the required depth, the feathers are rinsed in cold water and some more dyestuff solution added to the bath. These additions require good judgment, because too much dyestuff added would cause an abrupt, dull contrast instead of a desirable gradual shaking off, or transition from one shade to the other. There ought only a little more dyestuff be added each time, than has been absorbed from the bath by dyeing the preceding shade. If paper wrappings are used, they must naturally be untied for rinsing and replaced by longer pieces before entering the bath for the following darker shade. After rinsing the feathers must always be well squeezed out. If two colors are to be dyed, for instance light blue tip with brown lower part, dye first the whole feather light blue, rinse, dry, tie up the tip in paper, and dye the lower half brown.
It needs not to be mentioned that for dyeing two or three contrasting colors upon one feather only such dyes must be chosen as can serve for bottoming and topping one another without materially altering the character of the topping color.
EDGINGS OR BORDERS.
For this style of feather dyeing, use feathers of good quality, with wide and well developed vanes. They are dyed in two colors and shades only, presenting one color, mostly of a light shade, or a white "black" on both sides along the stems, while the outer edges for the vanes, or ends of the fibres, are dyed in a different color or darker shade. They make a particularly handsome effect when curled over the stem, setting off the edges in a fine contrast against the black showing through the curls.