The Amyloid Stain Kit (Congo Red) is intended for use in the histological visualization of amyloid in tissue sections. Examination under a polarizing microscope results in green birefringence of amyloid.Amyloid: Red to PinkErythrocytes: Light OrangeEosinophil Granules: Orange to RedNuclei: BlueKit contents: CRA500, Congo Red Solution, 500 ml.HMM500, Hematoxylin, 500 ml.BRT500, Bluing Reagent, 500 ml.