Allergy to Indigo powder

ramanmangal · Aug 2, 2013

I used a 50-50 mix of henna and indigo powders sold as Dr. Jain's 'Greynil' in India but results were only reddish hair, i.i., hardly any indigo effect. Then I began mixing to it some more of separately sold pure indigo powder from same source, Dr. Jain's. Though its gives slight blackish tinge but it results in terrible itching on the scalp for full day!
Has any one experienced such a problem? please help with some remedy.
Also please advise me about a tested, reputed herbal powder for hair dyeing with no side effects. I aim for a dark brown hair from currently nearly 70% grey hair.
Regards
Mrs Raman