Mallory-Stained Human Tongue Section

Developed by the late Frank Burr Mallory, an American pathologist, Mallory's stain is an important dye used by microscopists and histologists for preparations of connective tissues, fungi and molds, glands and other tissues, such as skin. Although there are several variations on the theme, or the chemical make-up and steps employed, Mallory's stains often feature alum (or iron) hematoxylin, a natural dye that stains nuclei blue and, when coupled with eosin, stains cytoplasm pink.