A while ago i went into a hairdressers to get my hair coloured, they had little cardboard adverts at each station advertising this product the salon was using. it was added to the dye and put on my hair and made the colour last for a lot longer before grey came through (usually this happens within 3-4 weeks) but this colour lasted at least 7 weeks before i could notice the roots coming through.
i went again and the salon had changed hands and they didnt know what i was talking about, im sure it was made by scwartzkopf (dont know how to spell it). Has anyone else heard of what it or know what its called??