10, 20, 30, 40…these are numbers you may have commonly seen while scrolling through your local beauty supply store. But why did we at GDY choose 25 volume developer for our best-selling lightening kit? It’s powerful enough to lift 4-5 levels without damaging your hair.
Levels of Developer
The most common volumes of developer are 10, 20, 30, and 40 volume. The volume relates to the strength of the developer, meaning the higher the number, the stronger the volume. 10 volume developer is commonly used with toners, while 20 and 30 are two of the volumes recommended for at home use.
Why would I not just use 40 volume all the time?
40 volume developer is the strongest level of developer, and we do not recommend it for at home use. Even with dark hair, it is easier and safer to do several rounds of lightning with a lower volume developer rather than try to lift your hair an extreme amount in one go with a higher volume developer. Keeping your hair healthy is our top priority!
Why did we choose 25 volume for our developer?
25 volume is the perfect in-between when it comes to developer volumes. Our GDY Lightening Kit can lift safely lift your hair 4-5 levels while soy protein strengthens your hair. Since moisture is removed from your hair during the lightening process, we’ve formulated our lightening kit with coconut oil to help add moisture back to your hair.