Fouchet-Van Gieson kit
Three-reagent kit for visualisation of bilirubin and collagen according to Kutllick. Bilirubin is a yellow-brown pigment, but changes to green due to oxidation induced by Fouchet reaction. Green bilirubin can easily be detected on yellowish and pink coloured background.
Masson Fontana kit
Six-reagent melanin and argentaffin granule staining kit, based on the reduction of silver nitrate to elemental silver. Melanin is a brown-black pigment normally present in the hair, skin, retina, iris and certain parts of CNS. Argentaffin granules are found in carcinoid tumours.