The hair toners you'll find at Tint Department are designed to be mixed with Developer, as is the BW2+ lightener. Developer (sometimes also referred to as peroxide) activates the hair toner or lightener. Without it these products do absolutely nothing!
Developers come in different strengths. 10 Vol Developer is more gentle, 20 Vol Developer is more powerful and 30 Vol Developer should only be used with lightener if you're experienced.
10 VOL: More gentle. 10 Vol Developer can be used with Wella Colour Charm Permanent Toners. Wella recommends using a 20 Vol, but I have used a 10 Vol with great results. 10 Vol Developers won't have a noticable lightening effect on your hair, so are great if you're looking to stay at the same level, or go a bit darker. They also are ideal if you'd like to get the most ashy results possible. 10 Vol is also a good choice if your hair is damaged.
20 VOL: More powerful. 20 Vol Developer will lighten your hair slightly and will give permanent results. Use this with Wella Colour Charm Permanent Toners.Keep in mind, as 20 Vol Developer lightens your hair slightly, it can cause brassiness at your roots (if they're darker than your lengths). If that's the case, use 10 Vol at the root and 20 Vol on your lengths.
30 VOL: Use with caution. 30 Vol Developer will give faster lightening results and is the strongest offered at Tint Department (I do not recommend 40 Vol, ever). Only use 30 Vol if you are experienced with at home hair lightening/bleach.
