BORDEAUX.
Scour and rinse the feathers well. Prepare a boiling hot bath slightly acidulated with sulphuric acid, to which add a liberal quantity of ponceau 6 R. B., a few drops solution of aniline blue, and some yellow dyestuff, such as turmeric, fast yellow, or quinoline yellow, and bring the bath to boil for a few minutes. Then chill to sharp hand-heat, enter the feathers and work until level, and sample; if still too light, add some more of all these dyestuffs. As the bath shows from the beginning the color it will produce, it can be corrected before entering the feathers.