Flagella Stain

Recipe

1.Dissolve 20g of tannic acid in 30ml of 60% ethanol

2.Dissolve 36g of aluminum chloride (hydrated) to the solution from step 1

3.Dissolve 20g of ZnCl2 in the solution from step 2

4.Dissolve 3g of rosaniline HCl in the solution from step 3

5.q.s. to 70ml with 60% ethanol