Water, Water everywhere.........
Generally, the water throughout the British Isles seems to work beautifully for both henna and indigo herbal hair colour and allows for great dye release from both. But if you’re in the UK, or outside the UK, and not getting good hair colour from your henna and indigo, then I suggest you buy distilled bottled water to mix up your henna powder and a high ph / mineral rich alkaline water to mix up your indigo powder, such as bottled mineral water - just make sure from the information on the label that it really is a mineral rich water and not just labelled “spring water” or “mineral water” as some waters are which don’t originate from anywhere remotely near a spring and don’t contain traces of any minerals. For cassia obovata, the water type shouldn’t make any difference at all.
To know more about water, check out the following links : http://www.drlam.com/A3R_brief_in_doc_format/2002-No5-Water.cfm and http://en.wikipedia.org/wiki/Water
Watch out for Water in Scandinavia ! ( an Indigo trouble spot)... and watch out for water generally !!
I’ve only had one person so far say that my indigo doesn’t work - that one unfortunate result is in Scandinavia. My personal theory is that it’s the water. I strongly advise you, if you’re in Scandinavia, to use distilled bottled water ( or tap water) to mix your henna, and to buy bottled mineral water (e.g. Evian) or my Ameera Aloe Vera Hair Juice to mix your indigo ( the Ameera Aloe Vera Juice will also help prevent any irritation from indigo). I’m quite certain that will sort the problem out and give you decent results. Do persevere - if you’ve previously tried henna / indigo and it didn’t work, please try again and change the water.
Take a look at all this ( going off slightly at a tangent here I know, but I think this is essential reading for anyone concerned at all about health issues and to understand why water works for indigo in some countries and not in others) :
Ireland's Campaign for Fluoride Free Water
The way I understand it is that the water in most Scandinavian countries, and some European countries, is not chemically treated in the same way as water in other parts of the world such as the UK and USA, with the result that countries like the UK and USA which have chemicals such as Fluorine and Chlorine added to water to kill bacteria, have alkaline rich water. The UK and USA say the addition of these chemicals is necessary because of pollutants in acid rain, and they advocate health benefits, but after reading the above links, I think the so called health benefits are highly questionable. In Scandinavian countries you generally have purer, more acid, water. It may be not as chemically / alkaline charged as our water, and that means, unfortunately, it doesn’t kick start indigo.