Peroxide & Developer
Let customers speak for us
from 3962 reviewsI dye my hair more blonde, curl it, use product and this stuff keeps my hair frizz free. After air drying it it just a little bit I put a couple pumps of this through out the ends. Amazing!
My salon stopped using this line up and found it on cosmetic world for an Amazing price?
My hair is wavy/curly, shoulder-length and thick. I love this product. It is true that the perfume is very present, but since you do not need a large amount of product, the perfume evaporates quickly. It leaves my hair very soft, without ever weighing it down, with well-defined curls. I love it!
Very nice, perfect cold blonde. It doesn't make my hair yellow. Love how long it stays on the hair. Best toning experience!
Maravilloso,me encantó el color y el brillo de mi pelo
Love this product line. Great results and a very natural colour result. Good quality.
J’adore ce spray ! Il aide à protéger les cheveux tout en les laissant doux et brillants. Sa formule biphasée est légère et ne laisse pas les cheveux lourds ou gras. Idéal pour mes cheveux décolorés.
Je sens qu’il les protège et les garde
plus beaux. Je recommande!
Lasts, great as just a deposit or over bleached hair.
My nails are recovering after long-term use of gel polish.
A good developer for hair color. It works really well and gives great results.
Very gentle retinol. It doesn’t irritate or burn my skin.
Excellent hair color! I’ve been using it for many years and absolutely love it. I’m very disappointed that it has been discontinued and that they’re only selling the remaining stock.
Excellent hair color! I’ve been using it for many years and absolutely love it. I’m very disappointed that it has been discontinued and that they’re only selling the remaining stock.
Excellent hair color! I’ve been using it for many years and absolutely love it. I’m very disappointed that it has been discontinued and that they’re only selling the remaining stock.
Excellent hair color! I’ve been using it for many years and absolutely love it. I’m very disappointed that it has been discontinued and that they’re only selling the remaining stock.
Excellent hair color! I’ve been using it for many years and absolutely love it. I’m very disappointed that it has been discontinued and that they’re only selling the remaining stock.
What customers think about the store
The store offers a wide selection of professional hair care and beauty products at competitive prices. Customers praise fast shipping, careful packaging, and excellent customer service. Popular for hard-to-find items, with reliable delivery across Canada and t... The store offers a wide selection of professional hair care and beauty products at competitive prices. Customers praise fast shipping, careful packaging, and excellent customer service. Popular for hard-to-find items, with reliable delivery across Canada and the US. Many loyal customers appreciate the quality products and rewards program.
Read moreAI-generated from customer reviews.
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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