I dont understand why people even use Vasmol colors, it is a color not an oil and also not a good color, its color starts to fade after few days of hair washs.
My mother used it for years but she does not have any good experience of this product.People should use good ayurvedic oils instead of vasmol to nourish their hair.
And now from my personal experience I will suggest you not to use any chemical colors on hair because it damages your hair and your hair will start falling very quickly.
Remember our hair will become grey eventually, so we can take a good, healthy and a balanced diet and any ayurvedic oil for masage to nourish them and slow the process of greying.
so atlast, best of luck and keep yourself healthy so your hair will be healthy.