A bleach bath is a mixture of bleach and developer that is used to lighten hair. It is a less damaging alternative to traditional bleach, and it can be used to achieve a variety of looks, from subtle highlights to all-over platinum blonde. Bleach baths are also used to correct color mistakes and to remove unwanted brassiness from hair.
Bleach baths are relatively easy to do at home, but it is important to follow the instructions carefully to avoid damaging your hair. The strength of the bleach bath will vary depending on the desired level of lightening. For subtle highlights, a weak bleach bath can be used. For more dramatic lightening, a stronger bleach bath will be needed.