Metachromasy

Metachromasia is a dyeing in histological stains, which is characterized by a different color than that of the dye used, for example, a violet coloration of mucins with the blue dye toluidine blue. The ability of a tissue to cause cells or intercellular substances such dyeing is called Metachromotropie. Physically, the metachromasia a shift of the absorption maximum based on the results in longer wavelength portions of the light spectrum be rendered amplified.