Just did the skin test for a pack of John Frieda clearly haven't learnt my lesson from using this product in the past - it's the most un-user-friendly skin test ever. But anyway...
I used the same plastic spoon first for colourant then developer, then tipped the excess developer back into the bottle and in doing so must have tipped a tiny amount of colourant in with it. Doh.
Will the developer still be ok to use in 48 hours when i wish to dye my hair?