Bismarck brown

Bismarck brown (Easlick's disclosing agent), one of a variety of dental applications, reveals deposits on the teeth by temporarily coloring them. Characterized by its brown color and licorice flavor.
References in periodicals archive ?
The exhibition's title, Bismarck Brown, comes from an old dye recipe book.
Bismarck Brown - the title comes from an old dye recipe - features the work of Julia Clegg, of Milnsbridge, who made the screenprints at Mirfield.
Her solo show, Bismarck Brown, based on the Leeds Road factory of Holliday Dyes and Chemicals, runs at the RIBA Site Gallery, Leeds, from August 25 to September 24.