Choosing WhiteMatte3 vs WhiteMatte10 for Powdery Matte Finish in Sunscreen Formulation
คำถาม
We are developing a sunscreen formulation and aim to achieve a powdery matte finish with a soft-focus effect. We plan to use either WhiteMatte3™ or WhiteMatte10™ (Boron Nitride).
- Which product (WhiteMatte3™ or WhiteMatte10™) is better suited for achieving a powdery matte finish in a sunscreen emulsion? Please explain the performance differences, considering particle size and visual effect.
- What is the suggested concentration range for the recommended WhiteMatte product?
- How is the compatibility of the recommended WhiteMatte product with our base ingredients, which include
Glycol MonostearateandCetyl Alcohol? - What are the essential formulation tips, including dispersion methods (e.g., phase of addition, equipment), to ensure optimal matte and soft-focus performance in the final sunscreen emulsion?
คำตอบ
For achieving a powdery matte finish and a soft-focus effect in a sunscreen formulation, WhiteMatte3™ (Boron Nitride 3micron) is the superior choice over WhiteMatte10™.
Comparison and Performance Differences
| Feature | WhiteMatte3™ (3 microns) | WhiteMatte10™ (10 microns) | Recommendation for Matte Finish |
|---|---|---|---|
| Particle Size | Smaller (3 microns) | Larger (10 microns) | Smaller particles provide better coverage and a smoother, more powdery feel. |
| Visual Effect | Opaque, High-Whiteness, Soft-Focus | Translucent, Adds Shine, Soft-Focus | The opaque nature of WhiteMatte3 is better for masking shine and providing a true matte look. |
| Texture | Excellent adherence, smooth, powdery. | Smooth, but the larger size tends to be more luminous/shiny. | WhiteMatte3 provides the desired powdery feel. |
Conclusion: WhiteMatte3™ is recommended because its smaller particle size (3 microns) and opaque nature are more effective at reducing shine and providing the high-whiteness and powdery feel required for a matte finish, while still delivering a soft-focus effect. WhiteMatte10™ is better suited for formulations where a luminous, translucent glow is desired, which is counterproductive for a matte sunscreen.
Recommendations and Formulation Tips
1. Suggested Concentration:
- Starting Range: Use WhiteMatte3™ at a concentration of 3% to 5% of the total formula.
- Note: Higher concentrations (up to 10%) can be used to maximize the soft-focus and powdery feel, but always test for texture and potential whitening/opacity.
2. Compatibility with Base:
- WhiteMatte3™ (Boron Nitride) is an inert, oil-dispersible powder. It is fully compatible with your base ingredients, Glycol Monostearate and Cetyl Alcohol, which are common components of the oil phase in O/W emulsions.
3. Formulation Tips for Matte Effect:
- Dispersion: Boron Nitride must be properly dispersed to prevent clumping and maximize its performance.
- Method: Disperse the WhiteMatte3™ powder thoroughly in the oil phase (along with the Glycol Monostearate and Cetyl Alcohol) before emulsification.
- Equipment: Use a high-shear mixer or homogenizer to ensure the particles are fully separated and evenly distributed. Poor dispersion will result in a gritty texture and reduced soft-focus effect.
- Enhancing Matte Effect: Boron Nitride is excellent for soft-focus and texture, but it is not a primary oil absorber. To achieve a truly long-lasting matte finish, especially in a sunscreen (which often contains oily UV filters), consider adding a dedicated oil-absorbing powder:
- Recommendation: Combine WhiteMatte3™ with an oil-absorbing agent like MatteSilica XL™ (high oil absorption) or MatteSilica™ (moderate absorption) at a concentration of 1-3%. This synergy will provide the desired powdery feel (from WhiteMatte3) and superior oil control (from MatteSilica).
- Addition Phase: Add the dispersed oil phase containing the WhiteMatte3™ to the heated water phase during the standard emulsification process.
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WhiteMatte3™ (Boron Nitride 3micron)
