Powder Facial Cleanser Formula Review

Regarding your powder facial cleanser formula and questions:

Your proposed formula is:

• AminoWash (Sodium Lauroyl Glutamate) 55%
• BabyFoam (Sodium Cocoyl Isethionate) 25%
• Protease Enzyme 0.5%
• Vitamin B5 (Panthenol) 1%
• Dipotassium Glycyrrhizate 0.5%
• Corn Starch 18%

Here are the answers to your questions:

1. Usage amount per wash: It is difficult to specify an exact amount in grams per use. The actual amount used will vary depending on the individual user's preference and skin type (e.g., those with oily skin might use slightly more). It also depends on whether fillers like corn starch are included in the formula, as this can affect the perceived amount needed.

2. Effect of surfactants on Protease activity: The surfactants in your formula should not destroy the activity of the Protease enzyme during use.

3. Substituting Protease with Papain or Bromelain: While Papain and Bromelain are also enzymes, Protease is generally the most suitable choice for a quick wash-off product like a facial cleanser because it works very rapidly upon contact with the skin. Papain and Bromelain typically require a longer contact time (around 5-10 minutes) to be effective, making them less ideal for a product that is immediately rinsed off.

4. Stability of Papain or Bromelain in Lotion or Mask: Papain and Bromelain are generally more stable in water-based formulations like lotions or masks compared to Protease. However, it is important to check the specific stability requirements (such as pH and temperature) for the particular grade of Papain or Bromelain you are using to ensure optimal activity in your formulation.

Regarding the formula itself, for a wash-off product like this powder cleanser, ingredients like Vitamin B5 and Dipotassium Glycyrrhizate provide minimal benefit as they are rinsed off quickly. You may consider omitting them from the formula.