I went to a fancy naice hairdresser a few weeks ago for a cut and colour. Disclaimer my hair needed a really good dye as I hadn't done the roots in a few months. I permanent dye my hair usually but have had it done at the hairdresser in the past.
The dye was a great cover after being done but I'm now noticing about a month later that a number of grey hairs that were previously covered by the dye have come back as grey. 'I don't mean grey roots here, I mean decent lengths of hair. It's not obvious unless you look but it is weird. I've never had this with permanent dye before.
When I went to the fancy hairdresser, they want to mix in semi permanent hair dye with my permanent because they said the effect would be better but I asked them not to because there was no point (to me) - I just wanted the permanent. Now I'm wondering if she had done this and hadn't told me as that would account for some grey showing through again. Or is it possible for permanent hair dye to do this? It's never happened to me before... I thought permanent was permanent.
I'm debating if I should contact them to check it and complain but I'm not a complaining person but at the same time, what's the point of paying for permanent hair dye when it doesn't all last more than a month?!