Peroxide & Developer
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from 3726 reviewsDefinitely makes my hair feel a bit softer and less frizzy. Really good price for the amount of oil you get compared to other similar options.
Good product and excellent service from cosmeticworld.ca
Most brands need a lot to get the benefits. You don’t need much for this stuff to work. Love it! And it also smells fantastic!
Great volume and hold. Love this hairspray and use it daily. Worth buying!!!!!
My favourite hair spray
Perfect product for baby highlights around the face where hair is thinner and more fragile.
After years of blowouts, I recently decided to embrace my natural waves, and this shampoo has been a game changer. It smells amazing, cleans thoroughly without weighing my hair down, and leaves my waves soft and defined. I loved it so much I purchased the entire line. Highly recommend for anyone embracing their natural texture!
Definitely much easier and cleaner than the most popular product that is normally and widely used
Excellent product and excellent service
I am very satisfied with the L'Oréal Professionnel INOA hair color and developer. Both products are of excellent quality and delivered great results. The hair color turned out beautiful, even, and long-lasting.
I was also very pleased with the service and delivery. The order arrived on time, was carefully packaged, and the entire process was smooth and professional.
I highly recommend these products and am very happy with my purchase.
My new fav right amount of cool
Level 10 bleach and thus is perfect
One of my hairstylist recommended me this mask and I’ve been using this mask for almost 8 years this is the best mask so far for dry hair and if you colour your hair a lot
This toning foam is the best! Tones cleanly and brilliantly, while giving both volume and softness. 5/5 recommend!
Good product and good CosmeticWorld
service!
What customers think about the store
Store offers professional hair/beauty products with competitive pricing and fast delivery. Customers praise excellent selection, rewards program, reliable service, and product quality. Quick shipping (often 24-48 hours) and secure packaging highly valued. Some... Store offers professional hair/beauty products with competitive pricing and fast delivery. Customers praise excellent selection, rewards program, reliable service, and product quality. Quick shipping (often 24-48 hours) and secure packaging highly valued. Some concerns about occasional shipping delays, expired products, and packaging damage.
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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