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.
Let customers speak for us
from 1073 reviewsUsed this on my hair and it's true to swatch. It's staying power is great as well and not damaging.
I have been using Inoa for 8 years now. It’s the only hair color that does not make my scalp itch nor give me headaches. Because its amonia free, I worry less about my hair strands.
Great people to buy items from , fast delivery too. I would buy more from these people anyway, thank you again
This spray works well to bring out curl!
These wipes are great for bathroom cleaning. And they are nicely thick enough and do not fall apart like Lysol wipes. I threw those ones out!
I use this hair colour, along with 5/5N Brown equally and 15 vol developer. Grey is completely covered This is great hair colour and the formula was provided by my colourist at a salon. She's been using Diarichesse for several years.
I use this hair colour, along with 5.15 Cappacino equally and 15 vol developer. This is great hair colour and the formula was provided by my colourist at a salon. She's been using Diarichesse for several years.
Love this stuff! I scrunch it through my hair after drying. I have wavey to curly hair (depending on what length I have it) and this brings out the curl and tames any friz. I've bought it 3 times now. The price keeps going up though! I wish I wasn't forced to pay $10 more than I did a few months ago. I can also use Eurfora piece works defing fibre paste and it's more reasonably priced. Please try to offer the price of the Kevin Murphy Killer Curls cream so it is more competitive.
Thank you, Deborah
Excellent product.
Thanks for your help, and sending my purchase so quickly. I will definitely purchase from your company again.
Love this product leaves my hair soft and shiny.
So happy that I found this site! Thank you will be buying again. Saves me so much money not going to the salon.
I highly recommend this product. It’s clean and natural. Doesn’t sting or bother my scalp. The color is amazing very natural .
I love this store because they have everything under the sun that you’d want for hair products and supplies. When I’m in Canada I shop in person and I just realized they watered doing online shipping. Fast and accurate service.
Best shampoo! Makes my hair very soft and shiny.
I have been using Majarel for many years but it is difficult to purchase when you are not a beautician. I was very fortunate to find cosmetic world. The service was prompt and the price very affordable. I would recommend this website to anyone looking for permanent hair dye or any other beauty products.
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