Inquiry about BEMT (Tinosorb S) Solubility and Usage in Day Cream for SPF 24 PA+++
ถามโดย: exherbthai
เมื่อ: November 05, 2018
ประเภทผลิตภัณฑ์:
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คำถาม
I am formulating a Day Cream and plan to use BEMT (Tinosorb S) for UV protection.
- Does BEMT cover both UVA and UVB rays?
- BEMT is a powder; how should it be properly dissolved in the formula to ensure effectiveness?
- What is the recommended solvent for BEMT, and can other oils like Fractionated Coconut Oil or Jojoba Oil be used?
- What percentage of BEMT and its recommended solvent (Octisalate) should I use to achieve SPF 24 PA+++?
- How do these ingredients affect the final texture of the cream?
คำตอบ
Re: Inquiry about Sunscreen in Day Cream
Hello,
Regarding your questions about using BEMT (Tinosorb S) in your Day Cream formulation:
- UVA/UVB Protection: Yes, BEMT provides broad-spectrum protection covering both UVA and UVB rays.
- Solubility: BEMT is a powder and requires complete dissolution to be effective. The staff recommends Octisalate (Ethylhexyl Salicylate) as the most effective solvent for BEMT. Using other oils like Fractionated Coconut Oil or Jojoba Oil might not dissolve BEMT sufficiently, potentially leading to recrystallization and reduced efficacy.
- Recommended Percentage for SPF 24 PA+++: To achieve SPF 24 PA+++, the recommendation is to use 2% BEMT along with 10% Octisalate. This combination is estimated to provide SPF 30/PA+++, but the exact SPF/PA values should be confirmed through laboratory testing.
- Effect on Cream Texture: The need to dissolve BEMT completely, especially using a solvent like Octisalate (which is a liquid), means that these ingredients will become part of your formulation and will influence the final texture of the cream. Proper formulation is essential to ensure stability and efficacy.
We hope this information is helpful for your formulation.
