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DIActivateur Developer 9-Volume

DIActivateur Developer 9-Volume is rated 4.8 out of 5 by 115.
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DIActivateur Developer 9-Volume
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What It Is

DIActivateur 9-vol. (2.7%) Developer is formulated to be used with:

• DIA Light Demi-Permanent Haircolor on color-treated or sensitized hair.

• DIA Richesse Demi-Permanent Haircolor on natural or color treated hair.

What It Does

9-vol. DIActivateur Developer pairs with DIA Light and DIA Richesse to create beautiful results for unlimited services.

What Else You Need to Know

DIA Light & DIA Richesse mix in a 1:1.5 ratio with 9-vol. (2.7%) DIActivateur Developer. DIActivateur Developer is formulated to be paired with DIA for best results.

 

DIA Light

• Use 6-vol. or 9-vol. (use 9-vol. when going darker)

 

DIA Richesse

• Use 9-vol. or 15-vol. (includes DIA Richesse Hi-Visibility)

• Mix ratio 1:1.5 (1 tube : 2.6 oz. developer)

• Apply with a bowl and brush or plastic bottle

• Development time from 2-20 minutes

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

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Rated 5 out of 5 by from Developer Thanks to BzzAgent and L’Oréal for the free samples to try out! This developer pairs perfectly with the new dis light acidic toners!
Date published: 2026-05-04
Rated 5 out of 5 by from A must The DIActivateur 9-Volume developer is the perfect partner for the Dia light range, providing the ideal balance of deposit and longevity. It ensures a consistent, professional application and helps achieve that signature high-shine finish clients expect.
Date published: 2026-05-04
Rated 5 out of 5 by from First impressions DIActivateur mixed smoothly with the toner and applied evenly. Processing felt controlled on a porous blonde hair and supported a clean consistent toned result without harshness. Would use again.
Date published: 2026-05-03
Rated 5 out of 5 by from Great! Always use the developer made for the product! This works wonders with the new hyaluronic acid demi formula and leaves the hair so shiny and healthy! I received this as a sample in exchange for my honest review.
Date published: 2026-05-03
Rated 5 out of 5 by from I really like this developer. It’s very gentle. It’ has a nice blendable consistency too. It’s a Demi also who’s again is more gentle.
Date published: 2026-05-02
Rated 4 out of 5 by from Nice developer I received this product for free in exchange for my honest review. I felt this was a good developer. Mixed nicely with the color. Nice combo.
Date published: 2026-05-01
Rated 5 out of 5 by from 9vol Developer 9 Vol that’s great for depositing Dia Light Toners into the hair. Doesn’t make the scalp feel itchy either.
Date published: 2026-04-29
Rated 4 out of 5 by from Good product Overall great product. The consistency of it is good and not super thick. I think it paired nicely with the color.
Date published: 2026-04-28
Rated 5 out of 5 by from I received this product in exchange for an honest review. When mixed properly with the Dia color line it provides a great consistency for application.
Date published: 2026-04-28
Rated 5 out of 5 by from Very nice consistency This developer is the perfect pair for the dialight demi color And I will definitely be using it again
Date published: 2026-04-28
Rated 5 out of 5 by from Dia Light developer Developer works perfectly with the Dia Lignt demis. Great consistently and allows time to process without toning too quickly. Must use with the toners for best application.
Date published: 2026-04-28
Rated 5 out of 5 by from reliable option for glossing, toning. I’ve been using the DIAActivateur 9-Volume Developer in my professional work, and it’s great for gentle, controlled processing—especially when toning or working on previously lightened hair. The consistency is smooth and easy to mix, allowing for even application and predictable results. I like that it processes in a more controlled way without being too aggressive, which helps maintain the integrity and shine of the hair.
Date published: 2026-04-27
Rated 5 out of 5 by from Good developer Smells good, has a great consistency! Didn't itch nor burn. And mixed well with its intended product!
Date published: 2026-04-24
Rated 5 out of 5 by from Worth trying First time using this product and consistency was good. No complaint from clients about sensitivity so thats always a plus. I received this from BzzAgent to review.
Date published: 2026-04-23
Rated 5 out of 5 by from Very nice L'Oréal DIA Light Demi-Permanent Hair Color blends well with natural tones . The color was very vibrant. The ammonia free is excellent it provided hydration and minimizes damage to hair ! The developer for this hair color is a low volume that helps your hair from being compromised.
Date published: 2026-04-23
Rated 5 out of 5 by from Great This developer is smooth and mixes really nicely to give nice even results
Date published: 2026-04-23
Rated 5 out of 5 by from It developes It's developer for demi's! Yay!🤭
Date published: 2026-04-23
Rated 5 out of 5 by from I love that this developer doesn't have a harsh odor. It is creamy and easy to work with.
Date published: 2026-04-22
Rated 4 out of 5 by from Nice developer The price is about average for this developer and it has a nice consistency.
Date published: 2026-04-22
Rated 5 out of 5 by from Great! This developer is such a great consistency and it’s super gentle on the scalp. It’s great!
Date published: 2026-04-22
Rated 5 out of 5 by from love I love the consistency of this developer. It is so creamy!
Date published: 2026-04-21
Rated 4 out of 5 by from Does the job This developer is good. I like the mixing ratio because I feel you get more bang for your buck. It has a slight smell but pleasant. The color mixes well and spreads easily. I used bowl and brush but I think it would be easily applied with a bottle as well.
Date published: 2026-04-20
Rated 5 out of 5 by from Love! I really like this developer for my dia color. It’s not irritating to my clients scalp & my formula always turns out perfectly!
Date published: 2026-04-20
Rated 5 out of 5 by from Does its job This color line was new to me but I enjoy acidic lines in other brands so I was excited to try. This was a good consistency. I love the new way of blending grey hair with Demi permanent and letting some of the grey peek through as a highlight. This developer covered grey enough and gave that beautiful blend I was going for. I’m excited to see the results 4 weeks from now.
Date published: 2026-04-19
Rated 4 out of 5 by from I like it, but… I love the consistency and the shade range. However, the shades I was sent are very specific and for someone who doesn’t regularly use this product, I haven’t been able to use it correctly or consistently.
Date published: 2026-04-19
Rated 4 out of 5 by from ☆☆☆☆ Recieved free sample online to try. True to tone. Needed to leave on full process time on level 10 highlight. A little thick and would apply with bowl and brush.
Date published: 2026-04-18
Rated 5 out of 5 by from great I absolutely love this developer. It makes the color feel so creamy and the application goes on smoothly. I definitely recommend this developer.
Date published: 2026-04-18
Rated 4 out of 5 by from Just ok Its ok. I do feel that it is a little thin for my liking.
Date published: 2026-04-18
Rated 5 out of 5 by from Overall good product The consistency takes some getting used to but it doesnt have a strong smell and it works well
Date published: 2026-04-18
Rated 4 out of 5 by from Good product Great developer, the consistency is a little liquidy but pairs well with the thickness of the color!
Date published: 2026-04-16
  • y_2026, m_7, d_9, h_10
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.47
  • cp_2, bvpage2n
  • co_hasreviews, tv_49, tr_66
  • loc_en_US, sid_loreal-professionnel-dia-developer-9-volume, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_saloncentric
  • bvseo_sdk, dw_cartridge, 17.1.0, p_sdk_3.2.0
  • CLOUD, getReviews, 8ms
  • reviews, product