Have put a red dye on pale copper hair. In parts it has just not taken . and has copper horrid patches . I have some red dye leftt.. do i paint over the gaps in red and leave on for full develipment time. ? Dh says leave it on less as it will.overlap the already dyed bits ..am anxious if i do that it womy take and feel.ahd leave on for full development time ???
The formula was .
Roots dark blond 7.then some red. With bit of copper . Dark blond red copper. 15 min.Then i had to apply to lenght with red copper. no 7base .
Ive hadnto apply what is left on the non covered bits. I had to use the first formula as we had thrown rest away .how long wd i leave this on the patcht bits please!!!!!! Thanks .