Stripping black dye out of hair is a process that can be done at home or in a salon. It involves using a chemical remover to break down the dye molecules and lift them out of the hair shaft. This can be a time-consuming and damaging process, but it is the only way to completely remove black dye from hair.
There are a number of different black dye removers on the market, and the best one for you will depend on your hair type and the type of dye that you used. It is important to read the instructions carefully before using any remover, as some can be harsh and can damage your hair if they are not used properly.