Peroxide & Developer
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from 3880 reviewsMakes my hair so soft and heathy feeling. Definitely worth a try!
Wow!! The level of lift you get from this product is outstanding; from a level 6 to a 9 in 40 minutes with a 20 VOL, no signs of any hot roots, now to a beautiful level 9 and I didn't even see the need to add a toner. Plus it smells good, no unpleasant strong bleach fumes or scalp irritation. I highly recommend this product.
I love this color, the quality of redken speaks for itself.
I love this one, it’s almost liquid so it’s great for full hair color.
It’s good quality and does the job
The pieces are pretty good quality, except the cape which I didn’t really care for anyway.
It’s short enough to use when grooming or coloring yourself. I used it to color my hair and it worked great, it’s adjustable to it fit great.
It’s pretty decent quality, doesn’t drip the product unless you squeeze it. The measurements are pretty accurate too.
This is my favorite soap . I'm so glad that Cosmetic World had it available. I love ordering from here. Their Customer Service is top notch. Thank you
Products always arrive safely and packaged well. Shipping is quick and very reliable.
I've ordered from here several times now and the products are great. Everything arrives safely and packed nicely.
It brights my skin
I love this processing solution. Just wish it was a little thicker but it works great!
I use 5N all the time! It doesn’t fade quickly.
I received my order in a timely manner with no problems. It’s a great product for ammonia free hair colour needs
What customers think about the store
Store offers extensive professional hair and beauty products with competitive pricing. Fast, reliable delivery and excellent customer service. Wide selection includes major salon brands. Customers praise product quality, helpful staff, and rewards program. Mos... Store offers extensive professional hair and beauty products with competitive pricing. Fast, reliable delivery and excellent customer service. Wide selection includes major salon brands. Customers praise product quality, helpful staff, and rewards program. Most orders arrive quickly and well-packaged.
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Developer comes in different strengths, the common ones being 10 volume, 20 volume, 30 volume and 40 volume. It’s possible to buy peroxide in stronger concentrations but they’re much too strong to use on hair and should be avoided. Developer strength is sometimes represented as a percentage. 6% and 20 vol. are the same strength.
Equivalent Developer Strengths;
- 10 Volume - 3%
- 20 Volume - 6%
- 30 Volume - 9%
- 40 Volume - 12%
What strength/volume developer should I use?
10 volume is ideal for use when you don’t want the natural hair color to be lightened by the dyeing process. It’s used in toners and color glazes. These types of dyes are known as “deposit-only”.20 volume peroxide is commonly used with semi-permanent and permanent hair colors. It can have a lightening effect on natural, undyed hair of 1 or 2 shades when used with permanent color.
When mixed with bleach powder, 20 volume developer will lighten virgin hair by about 5 levels.
30 volume developer is used for lifting out color. Its main use is in bleaching and it can lighten around 7 levels depending on the bleach powder used.
40 volume is occasionally used to lighten very dark, stubborn hair as part of the bleaching process. It lightens quickly and its effects are harsher than lower concentrations. 40 volume is not recommended for on-the-scalp use. Using 40 volume developer can cause hair damage and chemical burns if not used correctly. Instead, using multiple applications using lower volume peroxide will allow more controlled lightening.
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