Cold Process Hand-Mixable Gel Sunscreen SPF 60 PA+++ Formulation
คำถาม
I would like to request a sunscreen formula that meets the following criteria:
- SPF 60 PA+++
- Must be a Cold process formulation.
- Must be hand-mixable.
- Preferably a gel texture.
คำตอบ
Achieving a high SPF and PA rating like SPF 60 PA+++ in a cold-process, hand-mixable gel requires careful selection of UV filters and gelling agents, along with precise formulation and testing.
While I cannot provide a complete, tested formula for SPF 60 PA+++, I can suggest ingredients suitable for a cold-process gel texture.
Based on the search, Carbomer U21 is a suitable gelling agent for creating a clear, water-based gel texture without requiring heat, which fits your requirement for a cold process and hand mixing.
To achieve SPF 60 PA+++, you would need to incorporate a combination of high-performance UVA and UVB filters. These filters need to be compatible with a cold-process gel system and provide broad-spectrum protection. Identifying the specific UV filters and their required concentrations to reach SPF 60 PA+++ would require further searching and detailed formulation knowledge, including understanding regulatory restrictions and compatibility.
Formulating a stable and effective sunscreen at this high protection level is complex and typically requires specialized expertise and laboratory testing (like in-vivo or in-vitro SPF/PA testing) to confirm the final rating and stability.
Therefore, while Carbomer U21 can help you create the desired gel texture via cold process, developing a formula that reliably achieves SPF 60 PA+++ would require selecting appropriate UV filters and extensive testing, which goes beyond providing a simple recipe.
