Peroxide & Developer
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
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|
10 Volume
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3%
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20 Volume
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6%
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30 Volume
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9%
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40 Volume
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12%
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What strength/volume developer should I use?
10 volume is ideal for use when you don’t want the natural hair colour to be lightened by the dyeing process. It’s used in toners and colour glazes. These types of dyes are known as “deposit-only”.
20 volume peroxide is commonly used with semi-permanent and permanent hair colours. It can have a lightening effect on natural, undyed hair of 1 or 2 shades when used with permanent colour.
When mixed with bleach powder, 20 volume developer will lighten virgin hair by about 5 levels.
30 volume developer is used for lifting out colour. 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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I had used Mahdeen ACV Apple Cider Vinegar Foam Mousse before and then I moved and was never able to find it again. I recently had my hair cut and just couldn’t get the blowout right no matter which products I tried. I remembered this mousse and was lucky to find it at Cosmetic World. My hair just LOVES this product. It makes my fine hair a breeze to work with, it’s not stiff or sticky and the end result is exactly what I want; hair is shiny, soft but still holds your style, leaves no residue and smells amazing - and you can also use it to “fix” your ends when you’re in a hurry. I don’t understand why more salons & suppliers don’t carry this product. It’s the best hair product I’ve ever used. Thank you for carrying this product!!
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Very good hair color and very fast and convenient shipping, thank you so much! Great customer service!
Shipping and service was fast and excellent.
Made my hair so soft and silky, easy to use, great colour!
This was delivered to me the NEXT DAY! I was so impressed. I am a local shopper but I was beyond thrilled to have it arrive so quickly! Cosmetic World has The best selection of professional products at nearly professional cost! I used to buy from a place based out of QC but I’m now converted! Thank you Cosmetic World 🩷
Great way to try the line with these very deluxe size products!
Made my hair actually manageable instead of flat and harder to style!
Love the oil, really good quality.
Love the ease of finding new beauty and hair products. Fast shipping and great quality!
Worked wonders on over-processed hair. Left a lovely subtle shade a massive amounts of shine to dull overdone hair.
What more can one say? Schwarzkopf and Cosmetic World make an excellent partnership. Product is good, price is right, delivery and service are excellent.
I had trouble doing an online order. When I called the customer service was amazing and helped me with my order.
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