It uses the three stains&colon; aniline blue, acid fuchsin, and orange G. It has been used in the generation of aldehyde fuchsin. In 1861 he started producing fuchsin. Other aniline dyes followed, such as fuchsin, safranin, and induline. Van Gieson's stain is a mixture of picric acid and acid fuchsin. Acid fuchsin stains cytoplasm in some variants of Masson's trichrome. Elastic fibers stain well with aldehyde fuchsin, orcein, and Weigert's elastic stain in histological sections. In Masson's trichrome it is used as a counterstain to acid fuchsin. Franz Ziehl introduced the carbol fuchsin stain for the tubercle bacillus in 1882. Castellani's paint (Carbol fuchsin solution) is still occasionally used to treat fungal skin infections. Acid fuchsin is also a traditional stain for mitochondria (Altmann's method). Acid fuchsin is used as the nuclear and cytoplasmic stain in Mallory's trichrome method. In Van Gieson's picro-fuchsine, acid fuchsin imparts its red colour to collagen fibres.