L’ORÉAL PROFESSIONNEL DIA LIGHT CLEAR

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L’Oréal Professionnel Dia Light Clear is an acidic, ammonia-free clear gloss specifically formulated to add ultimate shine, condition, and a vinyl-like finish to color-treated or sensitized hair without any colour deposit . This versatile 3-in-1 professional tool can be used alone for a pure glossing service—providing up to 30% more conditioned hair—or mixed with any pigmented Dia Light shade to dilute, pastelise, and personalise colour for subtle, luminous reflects .
The innovative acid-gel cream technology features an acidic pH close to the natural pH of hair, ensuring zero lift (no lightening) while sealing the cuticle for incredible shine . The clear formulation also fluidifies the texture of any Dia Light mixture, making application on lengths and ends faster, smoother, and more even .
Mix at a 1:1.5 ratio (1 tube of Clear to 1.5 parts developer) with DIActivateur 6-vol (1.8%) for subtle gloss or 9-vol (2.7%) for standard results . Development time ranges from 5 to 20 minutes depending on desired intensity .
This product is intended for professional use only. To use as a pure gloss, mix 1 tube (50-60ml) of Dia Light Clear with 75-90ml of DIActivateur Developer, apply to dry, unwashed hair using sectioning techniques, process for 5-20 minutes, then emulsify, rinse thoroughly, and follow with a post-color shampoo . Always perform a patch test 48 hours before any coloring service.
Description

Table of Contents

L’ORÉAL PROFESSIONNEL DIA LIGHT CLEAR

PRIMARY USES

1. Acidic Clear Gloss for Ultimate Shine and Condition
  • What it does: Dia Light Clear is an ammonia-free, acidic clear gloss specifically formulated to add ultimate shine and condition to color-treated or sensitized hair without any color deposit . The formula seals the cuticle for a vinyl-like finish, providing up to 30% more conditioned hair and leaving hair healthier-looking with incredible shine . Unlike pigmented shades, Clear adds no tone, focusing purely on gloss and conditioning benefits .
  • How it helps your hair: For the person who wants to refresh tired, dull hair without adding or changing color, this provides a pure glossing service that enhances shine and condition. For anyone whose hair feels dry or damaged from previous coloring services, this means a gentle, restorative treatment that respects the hair’s integrity while delivering a luminous, healthy finish .
2. Dilutes and Pastelises Pigmented Shades
  • What it does: Dia Light Clear can be mixed with any pigmented Dia Light shade to dilute, pastelise, and personalise colour for subtle and luminous colour reflects . This allows stylists to create custom pastel tones, soften intense shades, or achieve the perfect level of opacity for each client. The clear formulation fluidifies the texture of any Dia Light mix for easy take-through on lengths and ends .
  • How it helps your hair: For the person wanting a soft, subtle pastel tone rather than a bold, intense colour, this provides a customizable solution that achieves the perfect shade intensity. For anyone who wants their colour to look soft and luminous rather than heavy or opaque, this means a personalised pastel result that flatters their individual style.
3. Fluidifies Mixture for Easy Take-Through
  • What it does: The clear formulation improves the texture of any Dia Light mixture, making it more fluid and easier to apply, especially when refreshing colour on lengths and ends . The fluid consistency allows for faster, smoother application and better distribution through the hair .
  • How it helps your hair: For the stylist performing colour refresh services on long or thick hair, this provides a more manageable, easy-to-apply formula that saves time and ensures even coverage. For the client, it means a more comfortable, efficient service with consistent, beautiful results .
4. Enriched with Gentle Acid Technology for Zero Lift
  • What it does: The formula features unique acid-gel cream technology with an acidic pH close to the natural pH of hair, ensuring zero lift (no lightening) while sealing the cuticle for a vinyl-like finish . It is specifically formulated for use on previously coloured, weakened, or sensitized hair, providing intense care without further damage.
  • How it helps your hair: For the person with color-treated or sensitized hair who worries about further damage or unwanted lightening, this provides a safe, gentle glossing option that respects the hair’s integrity. For anyone who wants to avoid the harshness of permanent color while achieving professional shine and condition, this means a formula designed for maximum care with zero lift.
5. Versatile for Glossing, Toning and Refreshing Services
  • What it does: Dia Light is a 3-in-1 professional tool designed for three key services: Hyaluronic Glossing adds shine and manageability; Hyaluronic Toning neutralizes unwanted undertones; and Hyaluronic Refreshing revives faded color on lengths and ends . Clear can be used alone for pure glossing services or mixed with pigmented shades for toning and refreshing.
  • How it helps your hair: For the person who wants a multi-purpose product that adapts to their changing hair needs, this provides endless possibilities—from pure shine enhancement to custom pastel tones to colour refresh. For anyone who wants professional, salon-quality results at home, this means access to a versatile tool used by professional stylists worldwide.

SECONDARY USES

1. Pure Glossing Service: Apply alone with DIActivateur 6 or 9 volume developer for a clear gloss service that adds up to 30% more conditioned hair, ultimate shine, and a vinyl-like finish without any colour deposit . For the person who wants to refresh dull, tired hair without changing their colour, this provides a pure conditioning treatment that restores shine and health.
2. Pastel Colour Creation: Mix with any pigmented Dia Light shade to create soft, luminous pastel tones—use higher proportions of Clear for softer pastels, lower proportions for more intensity . For the person wanting a soft, dreamy pastel pink, blue, or lavender, this provides a customizable solution that achieves the perfect delicate shade.
3. Colour Dilution for Subtle Results: Add Clear to pigmented Dia Light shades to dilute the intensity, creating softer, more natural colour results for clients who want subtle enhancement rather than bold change . For the person who finds standard shades too intense or opaque, this provides a way to achieve a softer, more natural-looking colour.
4. Texture Improvement for Lengths and Ends: Mix with pigmented Dia Light shades to fluidify the texture, making application on lengths and ends faster, easier, and more even, especially during refresh services . For the stylist refreshing colour on long or thick hair, this provides a smoother, more efficient application experience.
5. Custom Toning and Neutralizing: Mix with ash or violet shades to create personalized toning formulas with controlled intensity for neutralizing unwanted warmth on blondes. For the person who needs precise control over their toning service, this provides the ability to dial in exactly the right level of neutralizing power.
KEY PRODUCT FEATURES

1. BASIC IDENTIFICATION ATTRIBUTES

  • Brand: L'Oréal Professionnel Paris
  • Product Name: Dia Light Clear / Dia Light Acidic Gloss Clear
  • Shade: Clear / Transparent / Trasparente
  • Product Type: Acidic demi-permanent gloss color / Semi-permanent hair color / Clear gloss
  • Key Benefits: Up to 30% more conditioned hair, ultimate shine, vinyl-like finish, zero lift, ammonia-free, acidic pH technology
  • Key Technologies: Acid-gel cream technology, Acidic pH technology
  • Formula Integrity: Ammonia-free, vegan, 96% naturally derived ingredients
  • Volume: 50ml, 60ml, 250ml
  • Mixing Ratio: 1:1.5 (50-60ml color to 75-90ml developer) 
  • Recommended Developers: DIActivateur 6-vol (1.8%), 9-vol (2.7%), or 15-vol (4.5%)
  • Processing Time: 5 to 20 minutes
  • Longevity: Up to 6 weeks
  • Zero Lift: Does not lift natural hair colour
  • Not for: Grey coverage (use Dia Richesse for up to 70% white hair coverage) 
  • Made in: France
  • EAN/UPC: 3474630400191 

2. TECHNICAL & FORMULATION PROPERTIES

  • Key Technology 1: Acidic pH technology – pH close to natural hair pH, seals the cuticle, preserves cortex integrity, provides vinyl-like shine
  • Key Technology 2: Acid-gel cream technology – ensures seamless blend of colour, softens the hair fibre, adds tone without any lift
  • Key Technology 3: Milky cream/gel texture – allows for precision application and even distribution; fluidifies when mixed for easy take-through
  • Full Ingredient List: AQUA / WATER, GLYCERIN, ETHANOLAMINE, SODIUM CHLORIDE, CARBOMER, PEG-60 HYDROGENATED CASTOR OIL, POLYQUATERNIUM-6, CITRIC ACID, EDTA, TETRASODIUM EDTA, PARFUM / FRAGRANCE 
  • Proven Results: Up to 30% more conditioned hair after application on bleached hair; hair is softer, shinier, and healthier-looking
  • Primary Function: Add shine and condition to color-treated or sensitized hair, dilute pigmented shades for pastel and subtle colour reflects, fluidify mixtures for easy application
  • Application: Mix 1:1.5 with DIActivateur developer, apply to dry, unwashed hair, process 5-20 minutes, emulsify, rinse

3. PHYSICAL ATTRIBUTES

  • Product Form: Cream hair color / Gel-cream / Acidic gloss
  • Texture: Milky, creamy, smooth gel-cream consistency; fluidifies when mixed
  • Color: Clear / Transparent
  • Consistency: Smooth, spreadable cream; becomes more fluid when mixed
  • Scent: Light professional fragrance
  • Finish: High-shine, vinyl-like, glossy, conditioned
  • Packaging: Tube (50ml-60ml) or bottle (250ml)

4. HOW TO USE

For Professional Use Only:
This product must be used by a qualified hair professional. Do not use at home .
Preparation:
  1. Wear suitable protective gloves 
  2. Use a non-metallic bowl and brush for mixing 
  3. Do not use on persons under 16 years of age 
  4. Perform a patch test 48 hours before each coloring service 
Developer Selection by Service Type:
Service Type
Developer Volume
Processing Time
Pure Glossing (add shine only)
6-vol (1.8%)
5-10 minutes
Standard Glossing / Dilution
9-vol (2.7%)
10-20 minutes
Maximum Gloss / Colour Revelation
15-vol (4.5%)
15-20 minutes
Mixing:
  • For clear gloss service: Mix 1 tube (50-60ml) of Dia Light Clear with 75-90ml of DIActivateur Developer 
  • For dilution/pastel service: Mix Clear with pigmented Dia Light shade (e.g., ½ tube Clear + ½ tube shade) then add 1.5 parts developer
  • Mixing ratio: 1:1.5 (total colour mixture to developer) 
  • Mix thoroughly until a homogeneous, creamy consistency is achieved
  • When using a shaker (bottle), open immediately after mixing to prevent pressure buildup and product overflowing 
Three Key Service Applications :
  1. Pure Glossing Service: Apply Clear alone to add shine and increase manageability; use 6 or 9 volume developer; process for 5-20 minutes 
  2. Pastel Colour Creation: Mix Clear with pigmented Dia Light shade to create soft, luminous pastel tones; use 6 or 9 volume developer; process for 10-20 minutes
  3. Refresh and Gloss: Mix Clear with pigmented shade for colour refresh on lengths and ends; use 9 or 15 volume developer; process for 15-20 minutes
Rinse and Finish:
  1. At the end of the processing time, gently emulsify by adding a small amount of lukewarm water
  2. Rinse thoroughly until water runs clear
  3. Follow with a post-color shampoo (Metal Detox or Vitamino Color Spectrum) 
Pro Tips:
  • Do not use metallic tools (bowl, comb) during mixing or application 
  • For a better, faster, and easy take-through on coloured hair, mix Clear with pigmented Dia Light shades 
  • Clear fluidifies the texture of any Dia Light mix for easy application on lengths and ends 
  • Use higher proportions of Clear for softer pastel colours; lower proportions for more intense shades
  • The colour of the mixture will change during development time; this is normal and has no effect on the final colour result 
  • Always read the package insert before use
SAFETY HANDLING PRECAUTIONS

1. SAFETY PRECAUTIONS

  • For Professional Use Only: This product is a professional chemical color and must only be used by trained professionals 
  • Hair dyes can cause severe allergic reactions 
  • Patch Test: A patch test is obligatory 48 hours before each use. Apply a small amount of colour on a sensitive area of skin, such as the inside of the elbow. If after 48 hours no reaction is observed, proceed with the full application 
  • Protection: Wear suitable disposable gloves during the entire mixing and application process 
  • Do Not Use If: The client has a rash on the face, sensitive/irritated/damaged scalp, has ever experienced a reaction after colouring their hair, or has ever experienced a reaction to a temporary "black henna" tattoo 
  • Not for Use on: Eyelashes, eyebrows (may cause blindness), or persons under 16 years of age 
  • If the product comes into contact with your eyes, wash immediately and thoroughly with water 
  • Storage: Keep out of reach of children. Store upright in a cool, dry place away from direct light and heat 
  • Do Not Inhale or Swallow: Avoid inhalation and ingestion
  • Mixing: Do not use metal utensils during colouring (bowl, tweezers, combs, etc.) 
  • Compatibility: Use exclusively with L'Oréal Professionnel DIActivateur developers (6, 9, or 15 volume) 
  • Henna Precaution: Do not use if the hair has been coloured with henna or with a progressive hair colourant 
  • Post-Chemical Treatment: May be used on the same day as a texture service with 6 or 9 volume developer; wait at least 2 weeks after perming or straightening before applying with 15 volume developer 

2. FIRST AID MEASURES

  • Eye Contact: If product enters eyes, rinse immediately with plenty of clean, lukewarm water for at least 15 minutes. Remove contact lenses if present and easy to do. If irritation persists, seek medical attention .
  • Skin Contact: If product contacts skin, wash off immediately with soap and water. If irritation or redness develops, seek medical advice.
  • Ingestion: This product is not intended for ingestion. If accidentally swallowed, rinse mouth with water and drink a glass of water. Do not induce vomiting. Seek medical attention immediately.
  • Inhalation: If respiratory discomfort occurs, move to fresh air. Seek medical attention if symptoms persist.
  • Allergic Reaction: Signs may include rash, hives, itching, swelling of the face, lips, tongue, or throat, difficulty breathing, or dizziness. If an allergic reaction is suspected, discontinue use immediately, rinse thoroughly, and seek emergency medical attention.