I ve tried almost all the low range to costliest ones and went to parlour and did there also. All in vain, it ll go in a weeks time or max 10 days. I also develop itching and the more i itch, the more ll go off. If you had applied mehendi previously, those hair will not absorb the hair colour. It was told to me by a beautician in a parlour.
my mum colours her hair regularly. She once told me that she first colours her hair.... and then once every week or two, she washes her hair with mehendi (the one you use for hair - a good quality one). She told me that this helps the colour last a little longer. I personally haven't tried this. Jusy sharing coz I thought this might work for someone out there... Regards Kitty