This Developer opens cuticle and works as a depositor mainly to bring a little tint or tone. This Developer makes gentle lift for subtle changes close to the current hair color.
This Developer is suitable to lift 1-2 levels and this is very common choice for permanent hair color application and suitable to transforming from dark brown to light brown.
The 30 volume Developer normaly use to bring dramatic change for higher lifting in hair and creating a noticable lightening. And its lift by 2-3 levels. It is effective for lightening dark hair to medium shade. Do not use on scalp.
40 volume Developer used for extreme high lifting. Its lift 3-4 levels making it perfect for achieving very light blonde results. But must be handled very carefully when applying, do not touch the scalp, as well as prevent damage.