Fuchsin Acid Van Gieson kit is used for staining collagen, muscle tissue, keratinized epithelium, cytoplasm, glial fibers, and erythrocytes. The reagent contains two dyes (acid fuchsin, picric acid) that simultaneously stain different tissue structures. Acid fuchsin stains collagen fibers intensive red while picric acid stains muscle fibers, erythrocytes and glial fibers yellow. Amyloids, hyalin, colloid and mucosa are stained in nuances between red and yellow. Fuchsin Acid Van Gieson reagent is a component of Van Gieson Trichrome kit, as well as Weigert-Van Gieson kits.