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Small rectangular box with light brown and blue graphics, 60g ammonia-free permanent hair colour

L'Oreal

L'Oreal Inoa 5.1/5B Light Brown Blue Ammonia-Free Hair Color 2.1oz 60g

SKU CH-S46N-QSYA5

Ammonia-free permanent colour in Light Brown Blue 5.1/5B lightens up to 3 levels in 35 minutes and covers 100% of white hair

  • TypeHair Color
  • For Treatment OfNormal Hair
  • ColorMulti-Color
  • GenderAdult
  • AgeAdult
  • EcologicalHomeopathic
  • Ammonia-free formula provides comfortable colouring without harsh odour
  • ODS2 technology boosts shine by up to 50% for radiant results
  • Lightens up to 3 levels in 35 minutes for efficient processing
  • Covers 100% of white hair for complete grey coverage
  • 1:1 mixing ratio ensures easy, consistent application every time

Ammonia-Free Permanent Colour for Normal Hair

L'Oreal Professionnel Inoa 5.1/5B is an ammonia-free permanent hair colour designed for normal adult hair. It uses ODS2 technology to deliver full white-hair coverage and up to three levels of lift in 35 minutes. The 60 g tube mixes in a one-to-one ratio with developer for straightforward salon application.

Practical Limits of ODS2 Ammonia-Free Formula

The ammonia-free system reduces scalp discomfort and leaves hair feeling softer and more hydrated after colouring. Shine increases by up to 50 percent compared with untreated hair. Maximum lift is capped at three levels, so darker bases targeting lighter shades may need pre-lightening. Processing time is fixed at 35 minutes for consistent results.

Check Developer Strength and Professional Skill

Verify you have the correct peroxide developer volume for the desired lift and that a 1:1 mixing ratio suits your salon workflow. The product is formulated for professional expertise; incorrect timing or developer choice can cause uneven tone or damage. A strand test is essential before full application to confirm the 5.1/5B Light Ash Brown result on your client's base.

Highlights

  • Ammonia-free formula provides comfortable colouring without harsh odour
  • ODS2 technology boosts shine by up to 50% for radiant results
  • Lightens up to 3 levels in 35 minutes for efficient processing
  • Covers 100% of white hair for complete grey coverage
  • 1:1 mixing ratio ensures easy, consistent application every time

Specifications

BrandDial
TypeHair Color
For Treatment OfNormal Hair
ColorMulti-Color
GenderAdult
AgeAdult
EcologicalHomeopathic

Questions about this item

Which shade number should I select for light ash brown?

Choose the 5.1/5B code; it identifies the light ash brown tone in this permanent ammonia-free range.

What does "lightens up to 3 levels in 35 minutes" mean for my hair?

The formula can lift your natural colour by a maximum of three shades during the standard 35-minute development time.

What mixing ratio does the 2.1 oz tube require?

Mix the colour cream with developer in a 1 to 1 ratio by volume before application.

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