RED.
Scour and rinse the feathers well; grays must be bleached as near to white as possible, and these ought only to be dyed dark shades of red. Prepare a bath with twenty per cent., of the weight of feathers, bisulphate of soda, and see, as in all cases, that it is well crystallized and dry. (Never use the article when it looks decayed, forms lumps or is moist). Add four to six per cent. azo red, according to the shade wanted, raise the temperature to 170° F., enter the feathers and work to shade; take out, starch and dry.