L’ORÉAL PROFESSIONNEL DIA LIGHT 8.1 LIGHT ASH BLONDE

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L’Oréal Professionnel Dia Light 8.1 Light Ash Blonde is an acidic demi-permanent gloss color specifically formulated to tone, refresh, and enhance color-treated or sensitized hair without ammonia or lift . This innovative formula is powered by a 1% Hyaluronic Acid complex that instantly replenishes lost moisture, providing 2x more hydration, up to 82% glossier color, up to 3x less breakage after bleach, and leaves hair 30% more conditioned .
The 8.1 Light Ash Blonde shade delivers a cool, neutralized ash finish, perfect for neutralizing unwanted yellow and warm undertones after lightening services or refreshing faded color on lengths and ends . Ideal for toning highlights and balayage, glossing services, refreshing faded color, and pre-coloration applications, Dia Light offers versatile service opportunities for professional stylists . The unique acid-gel cream technology seals the cuticle for a vinyl-like finish, providing ultimate shine and silky smoothing of the hair surface .
The milky cream texture ensures precision application and even color distribution . Mix at a 1:1.5 ratio (1 tube color to 1.5 parts developer) with DIActivateur 6-vol (1.8%) for soft deposit on blondes, 9-vol (2.7%) for standard tone-on-tone results on brunettes, or 15-vol (4.5%) for maximum opacity . The “Milkshake” shades (Level 9 & 10) are specifically formulated for toning and glossing blondes after lightening service in just 2-10 minutes. Not for grey coverage over 30%—please refer to Dia Color for white hair coverage up to 70% .
This product is intended for professional use only. To use, mix 1 tube (50-60ml) of Dia Light 8.1 with 75-90ml of DIActivateur Developer at the desired volume, 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 8.1 LIGHT ASH BLONDE

PRIMARY USES

1. Acidic Demi-Permanent Gloss Color for Toning and Neutralizing
  • What it does: Dia Light 8.1 is an acidic demi-permanent gloss color formulated with a 1% Hyaluronic Acid complex, designed to tone, refresh, and add gloss to color-treated or sensitized hair without ammonia . The 8.1 Light Ash Blonde shade delivers a cool, neutralized ash finish, making it ideal for neutralizing unwanted warm and yellow undertones after lightening services .
  • How it helps your hair: For the person who wants to eliminate brassy, yellow tones from their light blonde hair while adding a cool, clean finish, this provides a gentle, low-commitment solution. For anyone seeking that fresh, “icy” blonde look with sophisticated ash reflects, this means an ammonia-free formula that respects the hair’s integrity while delivering professional results .
2. Enriched with 1% Hyaluronic Acid Complex for Deep Hydration
  • What it does: The formula is powered by a 1% Hyaluronic Acid complex that instantly replenishes lost moisture by enrobing the hair fiber in a hydrating film . It fights the first visible sign of damage—dryness—while providing 2x more hydration, 82% glossier color, and 30% more conditioned hair . The acidic pH helps seal the cuticle, preserving cortex integrity and strengthening hair after bleach with up to 3x less breakage .
  • How it helps your hair: For the person whose hair feels dry or damaged from previous lightening or coloring services, this provides a gentle toning experience that improves hair condition. For anyone who wants their color service to nourish rather than compromise their hair, this means a formula that hydrates and strengthens while it colors.
3. 3-in-1 Professional Tool: Gloss, Tone & Refresh
  • What it does: Dia Light is a 3-in-1 professional tool specifically designed for three key services: Hyaluronic Glossing adds shine and manageability; Hyaluronic Toning neutralizes unwanted undertones after lightening or balayage; and Hyaluronic Refreshing revives faded color on lengths and ends . The versatile formula allows stylists to customize results based on client needs, from subtle highlights to visible changes.
  • How it helps your hair: For the person with unwanted brassiness in light blonde hair, this provides a toning solution that neutralizes warmth while adding cool ash reflects. For anyone wanting to add shine and dimension to their color between salon visits, this means a versatile product that adapts to your specific needs.
4. 8.1 Light Ash Blonde Shade
  • What it does: Shade 8.1 is a Light Ash Blonde (Blond Clair Cendré) , delivering a cool, neutralized light blonde result with sophisticated ash reflects that eliminate unwanted warmth. The “.1” code indicates an ash reflect, providing effective neutralization of yellow and brassy undertones while maintaining a bright, luminous finish .
  • How it helps your hair: For the person wanting a clean, cool light ash blonde that eliminates yellow and brassy tones, this provides a beautiful, sophisticated finish. For anyone who wants their blonde to look fresh, modern, and cool-toned without being too grey or silver, this means a shade formulated for perfect ash neutralization.
5. Leaves Hair 30% More Conditioned with Zero Lift
  • What it does: Dia Light leaves hair up to 30% more conditioned, promoting healthier and more natural-looking results . The formula does not lift hair color or cover greys (up to 30% subtle grey coverage is possible) , focusing instead on toning, glossing, and refreshing with natural results . For grey coverage of up to 70% white hair, L’Oréal Professionnel recommends Dia Color.
  • How it helps your hair: For the person who wants beautiful color results without compromising hair health, this provides a conditioning color experience that seals the cuticle for vinyl shine . For anyone who wants their hair to feel as good as it looks, this means a formula that nourishes while it colors.
6. Mixable with 6, 9, or 15 Volume Developer for Customized Results
  • What it does: Dia Light mixes at a 1:1.5 ratio (1 tube color to 1.5 parts developer) with DIActivateur 6-vol (1.8%), 9-vol (2.7%), or 15-vol (4.5%) depending on desired opacity and service type . The 6-volume developer is recommended for soft deposit on blondes and sensitized hair; 9-volume for standard tone-on-tone results on brunettes; and 15-volume for maximum opacity . Development time ranges from 5 to 20 minutes depending on desired outcome .
  • How it helps your hair: For the stylist, this provides the flexibility to customize the opacity and intensity based on client needs. For the client, it means a tailored service that can range from a subtle gloss to a more noticeable color refresh, with results lasting up to 6 weeks .
7. Not Recommended for Natural Hair
  • What it does: Dia Light is specifically formulated for use on previously colored or sensitized hair and does not work on natural, uncolored hair . It is ideal for color-treated hair that needs refreshment, toning, or added shine.
  • How it helps your hair: For the person with color-treated hair who wants to maintain their look between salon visits, this provides the perfect solution. For those with natural hair seeking color, other L’Oréal Professionnel products are recommended.

SECONDARY USES

1. Toning After Lightening Services: Apply to pre-lightened or bleached hair to neutralize unwanted yellow or brassy undertones using 6 volume developer, processing for up to 20 minutes . For the person who has just had highlights or balayage and wants a clean, cool finish, this provides the perfect toning solution.
2. Glossing Service: Apply to all-over hair for 5-20 minutes to add intense shine, improve manageability, and deposit subtle color reflection without altering the base shade . For the person who wants a “gloss” service between color appointments, this provides a quick, low-commitment shine boost.
3. Refreshing Faded Lengths and Ends: Apply specifically to mid-lengths and ends after a permanent color root touch-up to revive faded light ash blonde color and ensure a seamless match, using 9 or 15 volume developer . For the person whose light blonde ends have faded faster than their roots, this provides an even, refreshed result.
4. Pre-Coloration Treatment: Suitable for pre-coloration techniques to even out porosity on damaged or sensitized hair before permanent color application. For the person whose color turns out darker on the ends than at the roots, this provides a preparatory step that creates a more uniform canvas.
5. Corrective Color Applications: Suitable for corrective color applications and pre-coloration techniques to even out porosity on damaged or sensitized hair. For the person with uneven color results, this provides a corrective solution that creates a more uniform canvas.
6. NOT FOR GREY COVERAGE: This product provides up to 30% subtle grey coverage ; for white hair coverage of up to 70%, L’Oréal Professionnel recommends Dia Color. This shade is specifically formulated for toning and glossing pre-lightened or color-treated hair.
KEY PRODUCT FEATURES

1. BASIC IDENTIFICATION ATTRIBUTES

  • Brand: L'Oréal Professionnel Paris
  • Product Name: Dia Light 8.1 / Dia Light 8.1 Light Ash Blonde
  • Shade: 8.1 Light Ash Blonde / Blond Clair Cendré 
  • Product Type: Acidic demi-permanent gloss color / Semi-permanent hair color / Tone-on-tone color 
  • Key Benefits: Up to 30% more conditioned hair, 2x more hydration, up to 82% glossier color, up to 3x less breakage, ammonia-free, zero lift, vegan 
  • Key Ingredient: 1% Hyaluronic Acid Complex 
  • Formula Integrity: Ammonia-free, vegan, acidic pH technology, up to 96% biodegradable formula 
  • Volume: 50ml - 60ml 
  • 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 of gloss color 
  • Grey Coverage: Up to 30% subtle grey coverage 
  • Made in: EU
  • Product Codes: EAN 3474630571143 , ASIN B00IHX3Y2I 

2. TECHNICAL & FORMULATION PROPERTIES

  • Key Technology 1: 1% Hyaluronic Acid Complex – instantly replenishes lost moisture and fights dryness 
  • Key Technology 2: Acidic pH technology – seals the cuticle, preserves cortex integrity, and creates vinyl shine; pH close to natural hair 
  • Key Technology 3: Acid-gel cream technology – ensures seamless blend of color, softens hair fiber, adds tone without any lift 
  • Shade Description: Light Ash Blonde – cool, neutralized ash finish for light blonde hair 
  • Full Ingredient List: AQUA / WATER, CETEARYL ALCOHOL, GLYCERIN, PROPANEDIOL, OLEIC ACID, OLEYL ALCOHOL, COCO-GLUCOSIDE, ETHANOLAMINE, GLYCOLIC ACID, PARFUM / FRAGRANCE, ASCORBIC ACID, TETRASODIUM GLUTAMATE DIACETATE, XANTHAN GUM, SODIUM METABISULFITE, TOLUENE-2,5-DIAMINE, SODIUM HYALURONATE, m-AMINOPHENOL, 4-AMINO-2-HYDROXYTOLUENE, PSEUDOALTEROMONAS FERMENT EXTRACT, TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES, 2,4-DIAMINOPHENOXYETHANOL HCL, THIOGLYCERIN, SALICYLIC ACID, SODIUM HYDROXIDE 
  • Proven Results: 2x more hydration, up to 82% glossier color, up to 3x less breakage on bleached hair, 30% more conditioned hair 
  • Zero Lift: Does not lift natural hair color 
  • Primary Function: Tone, refresh, and add gloss to color-treated or sensitized hair with gentle, ammonia-free formula
  • 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
  • Texture: Milky, creamy, smooth gel-cream consistency 
  • Color: 8.1 Light Ash Blonde
  • Consistency: Smooth, spreadable cream
  • Scent: Light professional fragrance, low odor 
  • Finish: Cool ash tones, high-shine, glossy, neutralized, vinyl-like finish 
  • Packaging: Tube (50ml-60ml) 

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 Hair Condition and Service Type :
Developer Volume
Best For
6-vol (1.8%)
Soft deposit on blondes, sensitized hair
9-vol (2.7%)
Standard tone-on-tone results, brunettes
15-vol (4.5%)
Maximum opacity, stronger deposit
Mixing:
  • Mix 1 tube (50-60ml) of Dia Light 8.1 with 75-90ml of DIActivateur Developer 
  • Mixing ratio: 1:1.5 (50-60ml color to 75-90ml 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. Hyaluronic Glossing (Shine Service): Apply globally to add shine and increase manageability; use 6 or 9 volume developer; process for 5-20 minutes
  2. Hyaluronic Toning (Patina): Apply to pre-lightened or balayaged hair to neutralize unwanted warm and brassy undertones; use 6 or 9 volume developer; process for up to 20 minutes
  3. Hyaluronic Refreshing: Apply to lengths and ends to revive faded color after root touch-up; 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 best results on pre-lightened or bleached hair, use Dia Light to tone immediately after lightening 
  • Works effectively on level 8-9 light blonde to achieve a cool ash blonde result
  • To maintain color vibrancy and cool ash tones, recommend clients use sulfate-free, color-safe products
  • The color of the mixture will change during development time; this is normal and has no effect on the final color result
  • For grey coverage beyond 30%, use Dia Color instead 
  • 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 color 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 coloring 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 coloring (bowl, tweezers, combs, etc.)
  • Compatibility: Use exclusively with L'Oréal Professionnel DIActivateur developers (6, 9, or 15 volume)
  • Henna Precaution: Not recommended for use on hair previously treated with henna or progressive color products 
  • 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
  • Does not work on natural, uncolored hair 

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 .