☛ Kopeloll’ and Beerman’s (Primary stain: Methyl violet. decolourizer: acetone or alcohol-acetone mixture 1:1)

☛ Jensen’s (Primary stain: Methyl violet, decolourizer: absolute alcohol. counterstain: Neutral red)

☛ Preston and Morrell’s (Primary stain: crystal violet. decolourizer: iodine-acetone)

☛ A.igert’s (Primary stain: Carbol gentian violet. decolourizer: Aniline-xylol). This is used to stain tissue sections.