Sunscreen Cream Formulation Method and Texture/Stability Improvement

Based on the staff's response, your proposed method for mixing the sunscreen formulation is generally correct.

The staff also suggested increasing the amount of Light Cream Maker from 1% to 1.5% to help improve the texture and stability of the cream.

Here is the formulation and method, incorporating the staff's suggestion:

Ingredients:

• SPF Protect Ultra: 20%
• Cyclomethicone: 5%
• Dimethicone (light): 5%
• Light Cream Maker: 1.5% (Suggested)
• Vitamin B3 (Niacinamide): 5%
• NAG (Glucosamine N-Acetyl): 5%
• EDTA (Disodium EDTA 2Na): 0.2%
• Mild Preserve (Ethylhexylglycerin Caprylyl Glycol): 1%
• Water: Remaining part

Method:

1. Mix ingredients 1, 2, and 3 together. Then add ingredient 4 (Light Cream Maker) and mix well. This is Part A.
2. Mix ingredients 7 (EDTA) and 9 (Water) together. Add ingredients 5 (B3) and 6 (NAG) and mix until dissolved.
3. Add the mixture from step 2 to Part A and mix thoroughly until a cream texture is formed.
4. Add ingredient 8 (Mild Preserve) and mix well.