Natural Stain

* These are very few in numbers.

* Examples :

1) Hematoxylin (Natural Black 1) , a naturally occurring flavonoid compound derived from the logwood tree, Haematoxylon campechianum.

2) Carmine (Carmine red) a natural red dye extracted from the dried females of the insect Dactylopius coccus var. Costa (cochineal).