This layer may be quite thin and evident only when treated with fuchsin or Bismarck brown, or it may be of considerable thickness.
Wines often contain coloring matters which at once completely arrest digestion, such as methylin blue and fuchsin.
If the bacilli are stained red with fuchsin, the background should be made blue.
This resembles that for the tubercle bacillus, viz., drying on a cover glass and staining with fuchsin or methyl-olin.
fuchsin fuch·sin (fyōōk'sĭn) or fuch·sine (-sĭn, -sēn')
Any of various red to purple-red rosanilin dyes used as bacterial and histological stains.