If you’ve ever colored your hair, you’ve probably seen 20 volume developer on a box or salon shelf. But what does it actually do? Many people confuse it with bleach or think it’s just a technical detail, but understanding 20 volume developer is key to achieving the perfect color. In this article, we’ll cover how it works, how much to mix with hair dye, its effect on dark hair, and comparisons with other developer volumes.
What Is 20 Volume Developer?
20 volume developer is a hydrogen peroxide-based solution used in hair coloring. It’s considered the standard for permanent hair color because it can:
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Lift natural hair color by 1–2 levels.
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Open the hair cuticle to allow color molecules to penetrate.
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Help deposit and fix permanent hair dye effectively.
It’s a versatile developer used in many professional and at-home coloring applications.
How Much 20 Volume Developer to Mix with Hair Color
Mixing ratio depends on the brand and type of color:
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Ion Permanent Hair Color with 20 Volume Developer: Follow the product instructions, usually 1:1 ratio (one part color, one part developer).
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Other brands: Often 1:1 or 1:2; always read the label.
Tip: Measuring accurately ensures even color and prevents over-processing.
20 Volume Developer on Dark Hair
Dark hair requires more lift to achieve noticeable color changes. Using 20 volume developer on dark hair can:
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Lighten hair slightly (1–2 levels).
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Allow vibrant color to show better than lower-volume developers.
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Reduce the risk of excessive damage compared to 30 volume developer.
If you want dramatic lightening, higher volume developers or bleach may be necessary.
Will 20 Volume Developer Lighten Hair Without Bleach?
Yes, but moderately. 20 volume developer alone (without bleach) can:
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Open the cuticle and slightly lift natural pigment.
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Help permanent color penetrate more effectively.
However, it won’t achieve major blonde results without bleach — it’s designed for gentle lift and color deposit.
Ion Permanent Hair Color with 20 Volume Developer
Using Ion Permanent Hair Color with 20 volume developers gives consistent, reliable results:
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Mix color and developer in recommended ratio (usually 1:1).
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Apply to clean, dry hair.
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Process according to package instructions, typically 25–40 minutes.
This combination ensures even color and prevents patchiness.
Wella 20 Volume Developer
Wella 20 volume developers is a popular choice in salons and home kits. It works similarly to other 20 volume developers:
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Lifts 1–2 levels of natural hair color.
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Ideal for permanent color or subtle highlights.
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Compatible with most Wella permanent dyes.
20 Volume Developer vs 30 Volume Developer
| Feature | 20 Volume Developer | 30 Volume Developer |
| Hair Lift | 1–2 levels | 2–3 levels |
| Hair Damage Risk | Lower | Higher |
| Best For | Standard permanent color | Dark hair or stronger lift |
| Color Control | More predictable | Can over-process easily |
Tip: For most at-home coloring, 20 volume developers is safer and easier to manage.
20 Volume Developers Before and After
When used correctly, the before and after results are noticeable yet natural:
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Before: Hair may look dull or darker than desired.
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After: Hair is lifted 1–2 shades, color is vibrant, and shine is enhanced.
Photos often show subtle but beautiful changes — perfect for first-time colorists.
What Does 20 Volume Developers Do?
In short, 20 volume developers:
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Opens the hair cuticle.
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Lifts natural hair color slightly.
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Helps permanent hair dye molecules bond and fix.
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Provides moderate lift without excessive damage.
It’s the sweet spot between low-volume (10) and high-volume (30) developers.
Read also <<< Korean Perm Guide 2025
FAQ: 20 Volume Developer
Q: Can 20 volume developers be used on all hair types?
A: Yes, but hair condition matters. Damaged hair may need lower volume.
Q: How long should I leave it on?
A: Follow the hair color instructions, usually 25–40 minutes.
Q: Will it lighten gray hair?
A: Yes, it can help cover gray hair when mixed with permanent color.
Q: Can I mix 20 volume developers with bleach?
A: Yes, but usually a higher volume developer (30–40) is recommended for significant lift.
Q: Is 20 volume developers safe for at-home use?
A: Yes, if instructions are followed and strand tests are done.
Conclusion
20 volume developer is a versatile and essential component in hair coloring. It provides moderate lift, helps permanent dyes bond, and works well on dark or natural hair without causing excessive damage. Whether using Ion or Wella products, following instructions ensures vibrant, long-lasting results.
