Depending upon porosity, a 25-30 volume developer on hydroxide-relaxed hair will have the same lifting ability as 40 volume developer on non-relaxed ethnic hair.
Hydroxide relaxed hair will lighten more easily and has more lifting ability than hair that is not relaxed with hydroxide. Depending upon porosity, a 25-30 volume developer on hydroxide-relaxed hair will have the same lifting ability as 40 volume developer on non-relaxed ethnic hair. Vibrant results can be obtained using a developer even lower than 25 volume. The final color won’t be as light, but still will be very intense, beautiful and add much conditioning and shine to ethnic hair.