L’ORÉAL PROFESSIONNEL DIA LIGHT 7.43 GOLDEN COPPER BLONDE

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L’Oréal Professionnel Dia Light 7.43 Golden Copper 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 up to 82% glossier color results and leaves hair up to 30% more conditioned .
The 7.43 Golden Copper Blonde shade—also described as Light Copper Gold Blonde—delivers a warm, luminous finish with beautiful golden and copper reflects, perfect for adding soft, natural warmth and dimension to medium blonde hair after lightening services or refreshing faded color on lengths and ends . Ideal for glossing services to add shine, toning services to neutralize unwanted undertones, and refreshing services to revive faded color, Dia Light offers versatile service opportunities for professional stylists . The ammonia-free, vegan formula does not lift hair color, focusing instead on toning, glossing, and refreshing with natural results.
The gel-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, or 15-vol (4.5%) for stronger opacity . Development time ranges from 5 to 20 minutes depending on desired intensity, with results lasting up to 6 weeks . Provides up to 70% grey coverage.
This product is intended for professional use only. To use, mix 1 tube (50-60ml) of Dia Light 7.43 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 7.43 GOLDEN COPPER BLONDE

PRIMARY USES

1. Acidic Demi-Permanent Gloss Color for Toning and Refreshing
  • What it does: Dia Light 7.43 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 7.43 Golden Copper Blonde shade—also described as Light Copper Gold Blonde and Medium Blonde Copper Gold —delivers a warm, luminous finish with golden and copper reflects, ideal for adding soft warmth and dimension to medium blonde hair.
  • How it helps your hair: For the person who wants to add soft, natural golden-copper warmth to their medium blonde hair while refreshing faded color, this provides a gentle, low-commitment solution. For anyone seeking a fresh, sun-kissed look with beautiful copper-gold dimension, 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 up to 82% glossier color results. The acidic pH helps seal the cuticle, preserving cortex integrity and strengthening hair after bleach .
  • 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: glossing adds shine and manageability; toning neutralizes unwanted undertones after lightening or balayage; and 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 faded medium blonde hair needing warmth and dimension, this provides a refreshing solution that adds beautiful golden-copper 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. 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, focusing instead on toning, glossing, and refreshing with natural results. It provides up to 70% grey coverage  and results last up to 6 weeks .
  • 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.
5. 7.43 Golden Copper Blonde Shade
  • What it does: Shade 7.43 is a Golden Copper Blonde, also described as Light Copper Gold Blonde and Medium Blonde Copper Gold , delivering a warm, luminous finish with golden (3) and copper (4) reflects. This combination creates a beautiful, sun-kissed result that adds soft warmth and dimension to medium blonde hair without being overly brassy.
  • How it helps your hair: For the person wanting a warm, natural-looking golden-copper blonde that adds radiance and dimension, this provides a beautiful, sun-kissed finish. For anyone who wants their medium blonde to look fresh and vibrant with subtle warm reflects, this means a shade formulated for perfect golden-copper warmth.
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; 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 intensity .
  • 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.

SECONDARY USES

1. Toning After Lightening Services: Apply to pre-lightened or bleached hair to neutralize unwanted warm undertones while adding golden-copper warmth using 6 or 9 volume developer, processing for up to 20 minutes. For the person who has just had highlights or balayage and wants a warm, dimensional 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 golden-copper blonde color and ensure a seamless match, using 9 or 15 volume developer. For the person whose medium blonde ends have faded faster than their roots, this provides an even, refreshed result .
4. Corrective Color and Pre-Coloration: Suitable for corrective color applications, pre-coloration, and creating warm lowlights to add dimension to blonde or highlighted hair . For the person wanting to add depth and warmth to their color without a full-color service, this provides a versatile option for dimensional results.
5. French Balayage Toning: Use to neutralize highlights after a balayage service or tone lightened strands without lightening the natural base, processing for 5 to 10 minutes . For the person with hand-painted highlights wanting a warm golden-copper finish, this provides a professional toning solution.
KEY PRODUCT FEATURES

1. BASIC IDENTIFICATION ATTRIBUTES

  • Brand: L'Oréal Professionnel Paris
  • Product Name: Dia Light 7.43 / DIA Light 7.43 Golden Copper Blonde
  • Shade: 7.43 Golden Copper Blonde / Light Copper Gold Blonde / Medium Blonde Copper Gold / 7.43 Gold Copper 
  • Product Type: Acidic demi-permanent gloss color / Semi-permanent hair color
  • Key Benefits: Up to 30% more conditioned hair, up to 82% glossier color, ammonia-free, zero lift, vegan, up to 96% natural ingredients
  • Key Ingredient: 1% Hyaluronic Acid Complex
  • Formula Integrity: Ammonia-free, vegan, acidic pH technology
  • 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
  • Grey Coverage: Up to 70%
  • Made in: Switzerland 
  • Product Codes: EAN 3474637004057 , ASIN B00BB9RD40

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: Gel-cream texture – allows for precision application and even distribution
  • Shade Components: Level 7 Medium Blonde with copper (4) and golden (3) reflects
  • Proven Results: Up to 30% more conditioned hair, up to 82% glossier color, 3x less breakage on bleached 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: 7.43 Golden Copper Blonde / Warm golden-copper
  • Consistency: Smooth, spreadable cream
  • Scent: Light professional fragrance
  • Finish: Warm golden-copper tones, high-shine, glossy, luminous
  • 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 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 7.43 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 
Three Key Service Applications :
  1. Glossing Service: Apply globally to add shine and increase manageability; use 6 or 9 volume developer; process for 5-20 minutes
  2. Toning Service (Patina): Apply to pre-lightened or balayaged hair to neutralize unwanted undertones while adding warm golden-copper reflects; use 6 or 9 volume developer; process for up to 20 minutes
  3. Refreshing Service: Apply to lengths and ends to revive faded color after root touch-up; use 9 or 15 volume developer; process for 15-20 minutes 
French Balayage Toning:
  • Apply to lightened strands after a highlighting or balayage service
  • Leave on for 5 to 10 minutes depending on sensitivity and desired effect 
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 7-8 medium blonde to achieve a warm golden-copper result
  • To maintain color vibrancy and warm golden-copper 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 up to 70%, Dia Light is suitable
  • 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

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.