Safe Bleaching Hair Guide: 9% Peroxide & Scalp Protection

chemical burn on scalp

When you bleach your hair, the real danger is not damaged hair – it is a chemical burn on the scalp. Written for the Hari Raya season, this guide keeps it to three things: swap 12% peroxide for 9% and go through the process in 2 rounds, prime the scalp with half a tube of Labbell Bio Protein before you start, and keep the bleach 5 cm away from the roots so it never touches the scalp. Hold a few extra details before and after, and you still get the lift you want without the burn risk.

Why 9% peroxide instead of 12%?

The short answer: 9% is a lower concentration, so it irritates less, yet doing 2 rounds still gives you a gradual lightening effect.

  • Instead of high-concentration 12% peroxide, do 2 rounds with 9% peroxide.
  • Why: the lower concentration reduces irritation while still achieving stage-by-stage lightening.

How do you protect the scalp with Labbell Bio Protein?

The short answer: use Labbell Bio Protein as a protective ampoule before the bleaching process starts.

How to apply

  • Spread half a tube evenly over the scalp and leave it for 10-15 minutes.
  • Wipe off the excess with tissue before applying the bleach.

Can the bleach touch the roots?

The short answer: no. Make sure the bleach does not touch the scalp – keep it 5 cm from the roots.

  • Tip: use a fine brush and work on the ends first.

What should you watch during the process?

The short answer: watch the colour of the scalp. If it turns red or bright pink, that is your stop signal.

  • Stop immediately and rinse with cold water.
  • Note: darker scalp skin is more sensitive – do a 24-hour allergy test beforehand.

Should you wash your hair before bleaching?

The short answer: no. Do not wash your hair for 2 days before bleaching, so the scalp’s natural oil stays as a protective layer.

When must you stop, or check with a professional first?

The short answer: never repeat the process on an irritated scalp, and speak to a professional if you have a history of reactions or are using scalp medication.

  • DO NOT repeat the process if the scalp is already irritated.
  • Consult a professional if you have had an allergy to hair products before, or are using scalp medication such as corticosteroids.

How do you recover after bleaching?

The short answer: put moisture back and give the hair a rest from heat.

  • Use Labbell Bio Protein as an after-procedure treatment to moisturise the hair.
  • Avoid heat (hair dryer, straightener) for 1 week.

Summary

Do it in 2 rounds with 9% peroxide, prime the scalp with Labbell Bio Protein, and keep the bleach 5 cm off the roots – with the small details like not washing your hair for 2 days before, you get the lightened hair you want without risking a chemical burn. To check whether your scalp and hair type can take a bleaching session, WhatsApp our salon team or look at the Schwarzkopf Igora Vario Blond bleach on the product page.

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