Skip to Content

Can You Use 40 Volume Developer on Dark Hair? Tips & Risks Explained (2025)

This site is supported by our readers. We may earn a commission, at no cost to you, if you purchase through links.

can you use 40 volume developer on dark hairYou can use a 40 volume developer on dark hair, but it’s not always the best option.

It’s strong enough to lighten even the darkest hair, especially when paired with bleach, but it can also cause serious damage if used improperly.

Think of it as the heavyweight champ of developers—powerful but risky.

Use it for dramatic lightening, like going from black to blonde, but always stick to timing directions and deep condition afterward.

If your hair’s thin or already processed, consider a weaker volume to avoid breakage.

Want to protect your hair while bleaching? Keep reading for essential tips and tricks!

Key Takeaways

  • You can use 40 volume developer to lift dark hair up to four levels, but it’s strong and carries a higher risk of damage if misused.
  • Always mix it with bleach or dye in a 2:1 ratio, start applying at the ends, and monitor every 5 minutes to avoid overprocessing.
  • Avoid applying it to the scalp directly, and use protective measures like coconut oil or petroleum jelly to minimize irritation.
  • Prep with deep conditioning treatments before bleaching and focus on aftercare with hydrating masks and neutralizing shampoos to maintain hair health.

What is a 40 Volume Developer?

What is a 40 Volume Developer
A 40 volume developer is a high-strength hair color developer with 12% peroxide, perfect for lifting levels in dark hair.

Powerful and precise, 40 volume developer transforms dark hair dramatically, lifting up to four shades with bold, vibrant results.

It’s powerful enough to lighten thick, dark strands up to four shades, transforming black to sandy blonde.

Mix it with bleach or dye in a 2:1 ratio for maximum dye penetration and vibrant results.

Remember, its strength can damage if misused, so always check your hair during processing, and don’t skip professional advice—it’s your ticket to bold blonde hair without breakage.

When to Use 40 Vol Developer?

When to Use 40 Vol Developer
You should use 40 volume developer when you need significant lift—like lightening dark hair by up to four levels in a single session.

It’s ideal for dramatic color changes but requires careful handling to avoid damage.

Gather Your Supplies

Before bleaching dark hair, gather these essentials: a sturdy mixing bowl, quality gloves to protect your hands, a dye brush for precise application, and hair clips to section your hair.

You’ll also need 40 volume developer, bleach powder, and dark hair dye.

Remember to check product selling websites for the developer.

Stick to the product ratio on the label—it’s key to safe and effective results.

Mixing The Developer (or Not)

Mixing your 40 volume developer properly is key when working with dark hair.

Follow the product’s recommended developer ratios—usually 1:1, 1:1.5, or 1:2 with bleach powder. Stir until creamy for smoother application.

Avoid mixing toner with 40 volume developer, as they aren’t compatible. Also, keep an eye on ingredient reactions, ensuring everything blends safely to prevent uneven lifting.

Getting Started

Before starting with a 40 volume developer for dark hair, assess your hair’s condition.

Dry or damaged strands need deep-conditioning treatments to prepare for lifting. Always patch test your products beforehand to avoid adverse reactions.

Protect your skin by applying petroleum jelly around your hairline. Divide your hair into sections for a smoother application.

Choose quality bleach and make certain the developer levels match your goals. Set realistic expectations—lifting dark hair takes patience.

Proper prep minimizes damage and guarantees even, effective lightening.

The Waiting Game

Color development is the make-or-break moment when using a 40 volume developer on dark hair.

Timing checks are your best friend here—monitor every 5 minutes to avoid over-processing and unnecessary damage. Use strand tests to gauge progress and stop immediately if you spot brittle or dry patches.

Want faster results? Apply gentle heat with care, but don’t overdo it.

Remember, the goal is lifting dark hair safely without turning it to straw. Always prioritize hair health over quick results, as this is crucial for avoiding damage and ensuring the best friend you can have in hair care is gentle heat.

Rinse and Condition

After lightening, rinse your hair with lukewarm water to gently wash away the bleach.

Follow up with a deep-conditioning treatment to restore hydration and repair damage.

Use a neutralizing shampoo to balance tones and a color-safe conditioner for added softness.

Incorporate weekly hair masks to enhance strength and shine, keeping your hair aftercare routine consistent for long-lasting results.

Aftercare of Hair for 40-Developer

Aftercare of Hair for 40-Developer
Caring for your hair after using 40 volume developer is critical to prevent damage and maintain hydration. Bleaching can leave strands thirsty, so focus on nourishing them back to health with proper hair aftercare.

Start with weekly deep conditioning treatments or hair masks to restore lost moisture. Look for products enriched with keratin, pro-vitamin B5, or argan oil for extra nourishment.

Pair this with color-safe shampoos and conditioners that gently cleanse while protecting vibrant tones. When washing, stick to lukewarm water—hot water dries out strands and worsens split ends.

To prevent brassiness, use a neutralizing shampoo designed for lightened hair. It’ll keep those blonde hues bright and free of yellow tones. Remember that this process can lead to increased hair porosity, so extra care is essential.

  1. Deep condition weekly with hydrating masks.
  2. Use color-safe products for gentle care.
  3. Finish with neutralizing shampoo for tone correction.

How to Dilute 40 Volume Developer to 20?

How to Dilute 40 Volume Developer to 20
To tone down the intensity of a 40 volume developer, dilute it to 20 volume by mixing equal parts with water. This reduces hair developer strength and helps minimize potential hair damage while still achieving beautiful lightening results.

Use distilled water for consistent water quality and results. You can find products related to developer dilution here.

Here’s how to dilute and apply effectively:

  • Dilution Ratio: Mix 1 part 40 volume developer with 1 part distilled water.
  • Spot Testing: Test on a small hair section to check the expected result.
  • Application Tips: Apply the mixture starting at ends, then move in the direction of roots.
  • Time Limit: Never leave it on hair for more than 30 minutes.
  • Storage Concerns: Discard leftover mixture—don’t store for future use.

When preparing 40 volume developer for lifting dark hair, always take it slow to avoid over-processing and damage.

What Does a 40 Volume Developer Do?

What Does a 40 Volume Developer Do
Thinking about tackling dark hair for a blonde transformation? A 40 volume developer is your go-to for dramatic change. With a 12% peroxide percentage, it’s the strongest hair developer strength available, lifting levels by up to four shades.

When paired with bleach or permanent dye, it opens the hair’s cuticle deeply, allowing intense color penetration. This makes it ideal for hair lightening on black hair or thick, resistant strands.

However, a strong hair developer like this needs cautious handling. Always mix it properly and avoid direct application to the scalp—it’s powerful enough to cause damage.

Check out these key facts:

Factor Impact
Peroxide Percentage 12%, making it extremely strong
Lifting Levels Up to 4 shades
Application Time 15-30 minutes max
Best Use Dark hair or resistant strands
Precaution Avoid scalp for safety

Use this wisely to achieve lighter locks!

What Volume Developer Should I Use for Dark Hair?

What Volume Developer Should I Use for Dark Hair
If you’re working with dark hair, the best developer choice depends on your goal.

For subtle lightening, 20 volume developer is reliable, lifting 1-2 levels while keeping hair health intact.

Opt for 30 volume if you want noticeable lift without excess damage.

Avoid using 40 volume developer on black hair at home—it’s powerful but risky without expert application techniques.

Remember that hair porosity matters when choosing a developer.

How Do I Lighten My Hair With 40 Volume Developer?

Lightening your hair with 40 volume developer requires careful steps to guarantee effective and safe results.

By sectioning your hair, mixing the bleach properly, and applying it strategically, you can achieve significant lift while minimizing damage.

Step 1: Split Your Hair Into Different Sections

Step 1: Split Your Hair Into Different Sections
To achieve an even application, split your hair into four consistent sections using sectioning clips.

This step keeps hair manageable and avoids tangles during the process.

Secure each section to maintain control, ensuring no areas are missed.

Smaller section sizes work best for precise hair color or dye application, so focus on neat, clean hair sections for smooth results.

Proper sectioning may require specialized hair clips for smooth results and to ensure complete control over the hair sections.

Step 2: Prepare Your Bleach

Step 2: Prepare Your Bleach
Grab a sturdy, non-metallic bowl and combine 40 volume developer with bleach in a 2:1 mixing ratio.

Stir until the mixture is smooth and creamy.

Wear gloves and old clothes to protect yourself.

Start applying the mixture from the ends, checking the consistency to avoid clumps. If you’re unsure, consider developer alternatives for gentler hair lightening dark strands.

Step 3: Apply The Bleach on Your Hair

Step 3: Apply The Bleach on Your Hair
Start by sectioning your hair into manageable parts for even coverage.

Use a dye brush to apply the mix of bleach and 40 volume developer on black hair, starting at the ends and working upwards.

Avoid the scalp for safety.

Keep timing consistency by checking progress regularly during processing dark hair.

Proper application order guarantees effective hair lightening dark strands.

Step 4: Work on Bleaching Your Roots

Step 4: Work on Bleaching Your Roots
Now that the ends are done, focus on your roots.

Use your dye brush for the Root Bleaching Technique, starting 1/8 inch from the scalp to prevent burns from the 40 volume developer.

Be mindful of Scalp Sensitivity Concerns, applying quickly to avoid banding.

Timing root bleach is key; check processing dark hair every few minutes for balance.

Step 5: Rinse Your Hair

Step 5: Rinse Your Hair
After bleaching, rinse your hair thoroughly with lukewarm water, keeping an eye on your hair rinse time to avoid unnecessary damage.

Use a neutralizing shampoo to remove any leftover product and prevent uneven tones.

Follow up with deep conditioning to restore moisture and protect your strands, and avoid over-washing, opting for cool water when possible, as it helps seal the cuticle.

This post-rinse care guarantees healthier, more vibrant hair.

How to Bleach Your Dark Hair Without Damaging It

Getting a blonde look without wreaking havoc on dark hair takes smart choices:

  1. Pick gentler options: Go for 30 volume developer instead of 40. It lightens brown to blonde with less risk.
  2. Keep an eye on timing: Apply bleach carefully and limit it to 15-20 minutes, checking every 5 minutes to avoid overprocessing.
  3. Prioritize health: Space bleach sessions at least a month apart. Use protein treatments, deep conditioners, and hydration methods between sessions to keep hair strong and vibrant. To further protect your hair, consider using bond-building treatments during the bleaching process.

Patience beats hair damage every time!

Don’t Forget to Do This The Night Before Bleaching Your Hair

Don’t Forget to Do This The Night Before Bleaching Your Hair
The night before bleaching your dark hair with a 40 volume developer, preparation is key to minimizing hair damage.

Focus on hair hydration—apply a deep conditioning treatment or hair mask to restore moisture. For scalp soothing, massage a small amount of coconut or jojoba oil onto your scalp to reduce irritation during the process.

Use a protein treatment to strengthen your hair and prevent breakage during hair lightening. Perform gentle detangling with a wide-tooth comb to avoid pulling or weakening strands.

Don’t skip a patch test by mixing a small amount of bleach and developer; apply it to a hidden section of hair to check for adverse reactions. These steps prepare your hair for bleaching without unnecessary risks or setbacks, ensuring hair hydration and scalp soothing are prioritized to minimize damage, and a successful bleaching process.

How to Bleach Your Hair in 7 Steps With 30 Volume Developer

How to Bleach Your Hair in 7 Steps With 30 Volume Developer
Before you start lightening dark hair, grab these essentials: a 30 volume developer, bleach powder (use a 2:1 bleach ratio), gloves, clips, and a brush.

Here’s how you can bleach safely:

  1. Prep Your Hair: Wash it first to remove oils so the hair developer works better.
  2. Apply Evenly: Section your hair, applying bleach from the ends up—roots are last.
  3. Time It Right: Check every 5 minutes; never exceed 30 minutes.

Remember to assess hair’s porosity beforehand for ideal results.

After bleaching, tone for perfect results.

After Bleaching, You Should Take Care of Your Hair Like a Newborn Baby

After Bleaching, You Should Take Care of Your Hair Like a Newborn Baby
Treat your freshly bleached hair like it’s fragile glass.

Hydration is key—use sulfate-free shampoos and rich conditioners every few days. Add weekly deep conditioning or protein treatments to restore strength and moisture.

For damage prevention, avoid heat tools and excessive styling. Protect your hair from sun exposure to maintain color vibrancy and scalp health.

Natural oils like coconut or argan oil can boost hydration and protect against breakage. Consistent care is your best defense against hair bleaching damage, focusing on sulfate-free shampoos, rich conditioners, and weekly deep conditioning. Keep those locks healthy!

Loreal Oreor

Loreal Oreor
L’Oreal Oreor Creme Developer 40 Volume is a trusted option for lifting dark hair up to 4 levels, helping achieve vibrant blonde shades while minimizing damage.

It’s perfect for medium to light blonde transformation with manageable application.

  • Application Tips: Mix a 2:1 ratio of Oreor and bleach, apply to ends first, roots last.
  • Benefits: Effective at hair color lifting for dark hair highlights and vibrant results.
  • Alternatives: Consider lower volume alternatives if less lift is desired.

Always rinse once the desired coppery tone is achieved!

MANIC PANIC

MANIC PANIC
Manic Panic’s 30 Volume Cream Developer is a great choice for lightening dark hair (brown or black) by up to five levels.

Its vegan, cruelty-free formula balances strong lifting power with hair health, preserving natural oils during processing.

The kit includes dust-free bleaching powder for even application across sections, ensuring smooth results. Plus, its low odor reduces irritation while maintaining compatibility with various Manic Panic shades.

Follow proper application techniques to enhance color longevity and avoid damage, especially if shifting from dark hair.

Feature Benefit Tip
Vegan formula Preserves hair health Perfect for porous hair
Dust-free powder Even application Work in sections for best results
Low odor Reduces scalp irritation Ideal for roots and sensitive scalps

Frequently Asked Questions (FAQs)

Can you use a 10 volume developer to darken hair?

Yes, you can use a 10 volume developer to darken hair.

It helps deposit color without lifting, making it ideal for subtle changes or rich, deep tones.

Always mix it with permanent hair dye.

Does 20 developer lighten hair?

Imagine you’re lightening your dark brown hair at home.

A 20 volume developer lifts hair 1-2 levels, ideal for subtle lightening or prepping for a vibrant dye.

It’s gentler than higher volumes but effective.

What is the difference between Volume 30 & 40 developer?

The main difference is lift strength.

Volume 30 lifts hair up to 3 levels, while Volume 40 lifts up to 4 levels, making it better for dramatic lightening.

Both need careful use to avoid damage!

How does 40 volume developer work?

A 40 volume developer works by opening the hair cuticle and infusing it with 12% peroxide.

It lightens dark hair up to four levels, delivering significant color changes when mixed with bleach or dye.

Can I use Vol 40 developer if I have dark hair?

Dark hair demands determination, and yes, you can use 40 volume developer for significant lightening.

It lifts up to 4 levels when mixed with bleach, but handle it carefully to avoid damage or uneven tones.

What developer should I use for dark hair?

Choose a developer based on your goal.

For subtle lightening, try 20 or 30 volume.

For dramatic changes, like lifting dark hair to blonde, use 40 volume, but handle it carefully to avoid damage.

What Volume Developer Should I Use for Dark Hair?

What Volume Developer Should I Use for Dark Hair 17
For dark hair, 30 volume developer is ideal for noticeable lift.

While 20 volume works for subtle changes.

Avoid 40 volume—it’s too harsh for at-home use and risks serious damage without professional experience, as it poses a significant threat with serious damage.

How Do I Lighten My Hair With 40 Volume Developer?

Mix 40 volume developer with bleach in a 2:1 ratio. Apply it to sectioned, dry hair starting at the ends. Avoid the roots, check every 5 minutes, and rinse after 20-30 minutes.

How to Bleach Your Dark Hair Without Damaging It?

Using 40 volume developer can lighten hair up to four levels.

But prep smartly—apply coconut oil beforehand, avoid washing for days, and section hair evenly.

Monitor every 10 minutes to prevent damage.

Don’t Forget to Do This the Night Before Bleaching Your Hair?

Prep your hair by applying coconut oil overnight to protect it from bleach damage.

Skip washing for a few days beforehand to let natural oils build up.

Comb through to remove tangles and guarantee smooth application of coconut oil.

Conclusion

In the case of using a 40 volume developer on dark hair, don’t bite off more than you can chew.

It’s powerful and effective for dramatic lightening, but it can easily damage your hair if you’re not careful.

Always follow proper timing, monitor your hair, and deep condition afterward.

If your hair is thin or already processed, consider a lower volume.

With the right care, you can lighten your hair safely and avoid unnecessary damage.

Avatar for Mutasim Sweileh

Mutasim Sweileh

Mutasim is a published author and software engineer and beard care expert from the US. To date, he has helped thousands of men make their beards look better and get fatter. His work has been mentioned in countless notable publications on men's care and style and has been cited in Seeker, Wikihow, GQ, TED, and Buzzfeed.