Congo Red based Amyloid Stains are metachromatic stains used to detect amyloid proteins in tissue. Our PureView™ Amyloid Stain Kit is based on the Puchtler modification with PureView™ Iron Hematoxylin used as the nuclear stain. Pure- View™ Iron Hematoxylin produces well-delineated nuclei but does not supress staining of amyloid deposits by the Congo Red. A pre-treatment solution prior to Congo Red intensifies the results by reducing background birefringence. Amyloid appear pink to red and an apple-green color when viewed with polarized microscopy.