aniline blue n.
A mixture of sulfonated triphenylmethane dyes used as a connective tissue stain and as a counterstain.
It can be made soluble by the action of sulphuric acid in just the same way as the other aniline blue.
Then rinse and dye upon a fresh warm bath with a mixture of aniline blue and a little methyl violet, using about twenty per cent.
aniline blue paper may also be employed conveniently for bluing in washing.
The case is probably one of an aniline blue dyed over a mineral pigment.
Spir′it-blue, an aniline blue obtained from coal-tar; Spir′it-duck, the buffle-head, from its rapid diving.