Description
How to Use
Ingredients
Warnings
Warranty
Description

Ammonia-free cool iridescent brown demi-permanent hair colour for neutralisation and gloss shine

The L’Oréal Pro Dia Color Demi-permanent Hair Colour 5.18 is a tone-on-tone, ammonia-free colour, designed to work on brown bases with a cool direction and iridescent reflection. Shade 5.18 is positioned as a brown with a dual cool tone, ideal for refining colour, softening warm reflections, and creating a more sophisticated and luminous finish.

When applied to dry hair, the creamy texture uniformly coats the hair fibre, allowing for precise and controlled application. The colour develops progressively, revealing a cool brown with an iridescent nuance and visible gloss shine. Hair appears more uniform, with depth and a refined finish from root to tip.

The lost melanin replenishment technology acts within the hair fibre, replicating natural colour and filling chromatic irregularities. The result is continuous colour, with balanced reflections and no artificial effect. Suitable for neutralising unwanted warm reflections, revitalising dull hair, or evening out faded lengths.

Lasting up to 6 weeks, the colour remains stable and luminous. Coverage can reach up to 70% of white hair, ensuring a natural and integrated result. The ammonia-free formula ensures greater comfort during the service and respect for the hair fibre.

With up to 92% natural-origin ingredients, this colour offers professional performance with a gentler approach. Suitable for colour maintenance, reflection correction, and shine enhancement on brown hair.

Key Features

  • L’Oréal Professionnel Demi-permanent Hair Colour
  • Shade 5.18 brown with cool iridescent reflection
  • Ammonia-free formula
  • Up to 70% white hair coverage
  • Lasts up to 6 weeks
  • Up to 3 times more shine
  • Lost melanin replenishment technology
  • Neutralisation of warm reflections
  • Lightens up to 1 shade and darkens up to 4 shades
  • Up to 92% natural-origin ingredients
  • Creamy texture for easy application
  • Professional 60ml format

Frequently Asked Questions

Is L’Oréal Pro Dia Color Demi-permanent Hair Colour 5.18 a cool shade?

Yes. Shade 5.18 features a cool direction with an iridescent nuance, ideal for balancing warm reflections.

Is this shade suitable for neutralising warm tones in hair?

Yes. It can help soften warm reflections, maintaining a natural and controlled result.

Does L’Oréal Pro Dia Color 5.18 cover white hair?

Yes. It can cover up to 70% of white hair, ensuring a uniform and natural finish.


The colour samples are merely indicative, as they may vary depending on the computer screen used for viewing. Therefore, Pluricosmética disclaims any responsibility for any colour variations that may arise.

How to Use

First application: The 20-minute development time begins at the end of the application.
Regrowth retouch: Apply to the regrowth area, begin the 20-minute development time, then immediately distribute through the rest of the hair to revitalise the colour with a deeper and/or darker result.
Distribute through the rest of the hair after 10 min, if lengths and ends are moderately faded.
Emulsify during the last 5 min, if the colour is slightly faded.
At the end of the development time, carefully emulsify for a few minutes. Rinse hair thoroughly until water runs clear. Wash with Metal Detox shampoo.

Ingredients
AQUA / WATER / EAU • CETEARYL ALCOHOL • ETHANOLAMINE • GLYCERIN • PROPANEDIOL • BUTYROSPERMUM PARKII BUTTER / SHEA BUTTER • OLEIC ACID • OLEYL ALCOHOL • COCO-GLUCOSIDE • TOLUENE-2,5-DIAMINE • SODIUM METABISULFITE • PARFUM / FRAGRANCE • m-AMINOPHENOL • HYDROXYBENZOMORPHOLINE • ASCORBIC ACID • TETRASODIUM GLUTAMATE DIACETATE • N,N-BIS(2-HYDROXYETHYL)-p-PHENYLENEDIAMINE SULFATE • XANTHAN GUM • HYDROXYETHYL-3,4-METHYLENEDIOXYANILINE HCL • SODIUM HYALURONATE • THIOGLYCERIN • CITRIC ACID
Warnings
Hair colorants can cause severe allergic reactions.
Read and follow the instructions.
Perform a preliminary allergy test 48 hours before applying any hair colour. If no irritation occurs, proceed with the application.
Carefully read the leaflet accompanying the product.
This product should not be used on individuals under 16 years of age.
For professional use only.
Wear appropriate gloves. If the product comes into contact with eyes, rinse immediately and thoroughly with water.
Do not use for colouring eyelashes and eyebrows.
Warranty
For more information about the warranty of products available on pluricosmetica.com, please refer to point 11 - "Product Warranty" on this page
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