The fulling stock for 72 ounces of beaver consists of a mixture of
| Black lead or plumbago | 16 ounces |
| Venetian red | 48 ounces |
| Indigo extract (fluid) | 5 ounces |
Ordinary Drab.—
| Common plumbago | 12 ounces |
| Best plumbago | 12 ounces |
| Archil extract (fluid) | 15 ounces |
| Indigo extract | 10 ounces |
Mix into fluid paste with water and add sulphuric acid at 30° Tw. For the dye liquor make a boiling-hot solution of the aniline dye and allow it to cool; then put into an earthenware vessel holding water and heat to 83° F., and add sufficient dye liquor to give the quantity of felt the desired shade. First moisten well the felted matter (or the hair, if dyed before felting) with water, and then work it about in the above dye bath at 140° F. To deepen the shade, add more dye liquor, lifting out the material to be dyed before adding the fresh dye liquor, so that it can be well stirred up and thoroughly mixed with the exhausted bath.