MiriMuri / Hair and makeup guides / How Many Bleach Sessions for Ash, Blonde or Pastel Hair - Ranges by Color
How Many Bleach Sessions for Ash, Blonde or Pastel Hair - Ranges by Color
The number of bleach sessions comes down to two things: how light the shade you want is, and how dark your hair is now, including its color history. As a rough guide, ash brown often takes 1 - 2 sessions, ash grey and light blonde 2 - 3, and pastels 3 or more. The ranges below assume dark, untreated hair, and results vary with hair condition.
What decides the number
- Starting darkness: black hair often needs about one more session than brown hair.
- Previous color: leftover dark dye lifts unevenly, causing patches and extra sessions.
- Hair thickness and condition: coarse, healthy hair lifts more slowly but also tolerates more.
- Target brightness: grey, pastel and platinum only show once almost all yellow is gone.
Stylists talk about lift in levels from 1 to 10. Black hair sits at 1 - 2, orange-brown around 5 - 6, yellow at 8 and pale yellow at 9 - 10. Knowing which level your shade needs makes the session count easier to estimate.
Approximate sessions by color
These are typical ranges for dark, previously uncolored hair.
- Ash brown, dark ash: 1 - 2 sessions. Level 6 - 7 is enough for a muted grey-brown.
- Ash blonde, ash grey: 2 - 3 sessions. Level 8 - 9 is needed so the grey does not turn muddy.
- Milk brown, caramel: 1 - 2 sessions. Warm shades do not need the yellow fully removed.
- Light blonde, platinum: 3 or more. Level 9 - 10 with the last pale yellow toned out.
- Pastel pink, lavender, mint: 3 or more. The closer to level 10, the cleaner the color.
- Red and orange shades: often 1 session, and sometimes no bleach at all.
Two salons can mean different things by "two sessions" because processing time and developer strength differ, so it is more accurate to discuss the target level than the count.
How much damage to expect
Bleach breaks down pigment inside the hair and, along the way, weakens the protein bonds that hold the strand together. The damage adds up with each session.
- One session: dryness and some stiffness, usually manageable with treatments.
- Two sessions: split ends and a stretchy feel when wet can appear.
- Three or more: the hair can thin and snap, which is why many salons add a bond-protecting additive.
Hair that is already damaged weakens far more from the same number of sessions, so a recent perm or straightening treatment must be mentioned to your stylist.
Keeping the color
- Color shampoo: purple shampoo slows the return of yellow on ash and blonde hair. Daily use dulls the shade, so once or twice a week is typical.
- Water temperature: hot water speeds up fading. Lukewarm is better.
- Heat tools: bleached hair is heat-sensitive, so avoid irons without a heat protectant.
- Roots: they grow out at about 1 cm a month. A roots-only touch-up causes less damage than re-bleaching the whole head.
- How long it lasts: pastels usually start shifting within 2 - 4 weeks, ash shades within 4 - 6.
If this is your first time
- Consider aiming one step lower. If pastel is the goal, stop at ash blonde on the first visit, check how the hair is coping, and decide the next step from there.
- If your scalp is sensitive, skipping a wash for a day or two before the appointment tends to reduce irritation.
- Be precise about the last six months of color, perms and straightening. This is where results and damage differ most.
- For two weeks afterwards, alternate protein and moisture treatments and cut down on heat styling.
- Bring reference photos taken both indoors and outdoors, which makes it easier to agree on brightness.
See it on your own face first
Bleaching is hard to reverse in both sessions and cost, so it helps to know whether the shade suits your face before you commit. Upload one photo to MiriMuri and you can try ash grey, light blonde and pastel pink on your own face and compare them. Sign-up comes with 20 free credits, and you can save the colors you like and show them at your consultation. Try it free on MiriMuri
The preview is a reference for choosing a color direction. The real shade depends on the level of lift, your hair's condition and the products used.
The number of bleach sessions is set by the brightness you want and the hair you start with, so use the ranges here, ash 1 - 3 and pastel 3 or more, as a starting point and settle the target level with your stylist.
Questions people ask
Can I get ash hair with one bleach?
A dark ash brown is sometimes reachable in one session, but a clear ash grey or ash blonde usually takes 2 - 3. Ash shades only show properly once the red and yellow tones in the hair have been lifted out, and the darker your starting hair, or the more previous color it carries, the more sessions that tends to take.
Is it safe to bleach twice on the same day?
Salons sometimes do two rounds in one visit while watching the hair closely, but beyond that the damage climbs quickly. If it is your first bleach or your hair is fine, one round per visit with 2 - 3 weeks in between is the safer route. If your scalp stings, the product should be rinsed off early rather than left for the full time.
How long does bleached color last?
Pastel shades fade noticeably within a few washes and typically last 2 - 4 weeks. Ash shades usually start showing yellow again after 4 - 6 weeks. Color-depositing shampoo, lukewarm water and washing less often slow the fade but do not stop it. Roots grow out at roughly 1 cm a month, so a touch-up is due around then.
What should I prepare for a first bleach?
Tell your stylist about any color, perm or straightening in the last six months, and bring two or three photos of the shade you want. Skipping a wash for a day or two before the appointment tends to make the scalp less sensitive. For the first two weeks afterwards, most people cut back on heat tools and alternate protein and moisture treatments.