Sunscreen Formula Questions

Regarding the sunscreen formula using SPF Protect Ultra (20%), Light Cream Maker, Water, and a preservative, here are the answers to your questions:

• Is this formula waterproof? Can it be used for swimming?
  Based on the components mentioned, particularly the use of Light Cream Maker as an emulsifier which creates an oil-in-water emulsion, this formula is likely not waterproof or highly water-resistant. Standard oil-in-water emulsions without specific water-resistant polymers tend to wash off in water. Therefore, it is not recommended for use while swimming if you require water resistance.

• Can it be washed off with regular body wash?
  Yes, a sunscreen formulated as an oil-in-water emulsion using Light Cream Maker should be washable with regular soap or body wash.

• How many hours of sun protection does it provide per application?
  Sunscreen protection is measured by SPF (Sun Protection Factor) for UVB rays and PA for UVA rays, not typically by duration in hours. At a 20% concentration, SPF Protect Ultra III is indicated to provide approximately SPF 50. However, the effectiveness and duration of protection depend on proper application amount, activities (like sweating or swimming), and reapplication. General advice for sunscreens is to reapply every two hours, and immediately after swimming or excessive sweating, to maintain adequate protection.

• Can it be used on the face & body of a 6-year-old child?
  SPF Protect Ultra III contains chemical UV filters. While these filters are commonly used, some chemical sunscreens can potentially cause irritation on sensitive or young skin. Physical sunscreens (containing Zinc Oxide or Titanium Dioxide) are often preferred for children due to their generally lower potential for irritation. Without specific testing data for this particular formula on children's skin, it is difficult to definitively confirm its suitability and safety for a 6-year-old's face and body. It is always advisable to perform a patch test on a small area of skin before full application, especially on children.

For optimal sun protection, always apply sunscreen generously and reapply as recommended.