I decided to make a cold process soap using the red tandoori colour mixed with a little oil. So far, so good. The rose water appeared to keep its subtle fragrance and the teaspoon of tandoori colour turned one half of the soap a lovely rosy pink. I poured the soap into my mould, covered with plastic wrap and wrapped in a towel to keep warm. I was so excited and couldn't wait until the following day when I could unmould and cut. I just love that part of soap making! It's sort of like unwrapping a present each time!. Well, I unwrapped, and was shocked to see that my lovely rose coloured soap had turned a deep, vibrant tandoori orange! Not what I had in mind at all! I was looking at a kilo of tandoori soap with a hint of rose.
Well it has been curing for a week now and the tandoori orange is not fading. I'll take some pics and post them for you to have a look at. I am thinking that the tandoori colour is going to prove to be very stable and vibrant. If that is the case...then I will know to only use the tiniest, tiniest bit of this colour in the future. It is just so vibrant!
I would be interested to know if anyone has had success with colouring their soaps with food colours that are oil soluble.
Update: the soap is cured and the colour has remained strong and vibrant. No fade at all. I can't sell these soaps as I did not cut them very evenly and they look a bit shoddy...but next batch will be perfect!! I can't believe how the tandoori colour "pops"!