L’ORÉAL PROFESSIONNEL DIA LIGHT 10.21

L’ORÉAL PROFESSIONNEL DIA LIGHT 10.21 

LIGHTEST ASH IRIDESCENT BLONDE (IRIDESCENT SORBET MILKSHAKE)

PRIMARY USES

1. Acidic Demi-Permanent Gloss Color for Toning and Neutralizing

• What it does: Dia Light 10.21 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 10.21 Lightest Ash Iridescent Blonde shade—also known as “Iridescent Sorbet Milkshake” or “Milkshake Platinblond Irisé Asch”—delivers a cool, pearlescent ash finish with iridescent reflects, making it ideal for neutralizing unwanted warm undertones after lightening services .

• How it helps your hair: For the person who wants to eliminate brassy, yellow tones from their platinum or very light blonde hair while adding a cool, pearlescent finish, this provides a gentle, low-commitment solution. For anyone seeking that fresh, “icy” blonde look with silver-mother-of-pearl 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 new 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 and up to 82% glossier color results . 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 platinum or very light blonde hair, this provides a toning solution that neutralizes warmth while adding cool, pearlescent 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. 10.21 Lightest Ash Iridescent Blonde / Iridescent Sorbet Milkshake Shade

• What it does: Shade 10.21 is a Lightest Ash Iridescent Blonde, also known as “Iridescent Sorbet Milkshake” or “Milkshake Platinblond Irisé Asch” . The double-code “.21” indicates a combination of ash (1) and iridescent pearl (2) reflects, delivering a cool, pearlescent very light blonde with a sophisticated, multi-dimensional finish that catches the light beautifully.

• How it helps your hair: For the person wanting a clean, cool very light ash blonde with iridescent pearlescent reflects that eliminate yellow and brassy tones, this provides a beautiful, sophisticated finish. For anyone who wants their blonde to look fresh, modern, and cool-toned with a unique pearlescent glow, this means a shade formulated for perfect iridescent neutralization.

5. 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 provides soft color deposit for natural, more transparent results on blondes; 9-volume delivers standard tone-on-tone results; and 15-volume offers stronger deposit for maximum color revelation . 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 .

6. Leaves Hair 30% More Conditioned with Zero Lift

• What it does: Dia Light leaves hair 30% more conditioned, promoting healthier and more natural-looking results . The formula does not lift hair color or cover greys, focusing instead on toning, glossing, and refreshing with natural results .

• 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.

SECONDARY USES

1. Toning After Lightening Services: Apply to pre-lightened or bleached hair to neutralize unwanted yellow or brassy undertones 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 cool, pearlescent 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 very light ash blonde color and ensure a seamless match, using 9 or 15 volume developer . For the person whose platinum or very light 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 cool lowlights to add dimension to very light blonde or platinum hair . For the person wanting to add depth and contrast to their color without a full-color service, this provides a versatile option for dimensional results.

5. NOT FOR GREY COVERAGE: This product is not designed for 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.