Stability of DHHB with Zinc Oxide in Sunscreen Formulation

Asked by: siranant.pooliam On: September 02, 2014 Product Type: Cosmetics

Question

Is DHHB available for purchase on the myskinrecipes website? I couldn't find it.

Additionally, when combining DHHB with Zinc Oxide, will there be stability issues similar to those encountered when combining Avobenzone with Zinc Oxide?

I am interested in mixing DHHB with Zinc Oxide to achieve a high PA protection level (like PA+++++) for daily sun exposure prevention.

Answer

Ingredients to Purchase for Makeup Formulations

Based on the discussion regarding the formulations for Pressed Powder, BB/CC Cream with sunscreen, Shimmer colors, and Primer, here is a list of ingredients you would need to purchase:

  • Powders & Texture Enhancers:

    • Sericite Powder (CompactPro™, Matte, Dimethicone Coated): Used as a base powder for pressed powder and primer, provides a soft, silky feel and natural coverage.
    • BB Micro Silk™: Helps provide better coverage and conceals wrinkles and pores in powders, BB/CC cream, and primer.
    • MatteSilica 5™ (5 Micron): Used for oil absorption and creating a matte, smooth feel in BB/CC cream and primer.
    • Magnesium Stearate: Helps powder products adhere better to the skin, used in pressed powder and primer.
    • Mica Powder (9 Micron, Silane Coated): A general mica powder that can be used as a base or mixed with colors.
  • Colors & Pigments:

    • D&C Red No.6 Lake EasyMix™ (India): Used to create pink tones.
    • Beige Iron Oxides EasyMix™: Used for adjusting the skin tone color in BB/CC cream.
    • Red Iron Oxides EasyMix™: Used for adjusting the skin tone color in BB/CC cream.
    • Yellow Iron Oxides EasyMix™: Used for adjusting the skin tone color in BB/CC cream.
    • Pretty Pink Mica (size A): A pink mica for shimmer effects.
    • Pink Orange Mica (size A): A pink-orange mica that can be used to create peach tones.
    • Light Gold Pearl Mica (Size A, 30 Micron): A gold mica that can be used to create peach tones and add shimmer.
  • Liquids & Bases:

    • Butylene Glycol: Used as a solvent, including for pressing powders.
    • Dimethicone (Medium/350, Low-Odor): A silicone oil used for smoothness and binding powders, mentioned for pressed powder and primer.
    • Cyclopentasiloxane (Low-Odor Cyclomethicone): A lightweight silicone used in primer and the BB/CC cream base.
    • Silicone Gel (Medium Matte, Dimethicone Base): Used in the primer formula for texture and a matte feel.
    • Light Cream Maker™: Used as the emulsifier for the BB/CC cream base.
  • Sunscreens:

    • Avobenzone (Butyl Methoxydibenzoylmethane): A UVA chemical sunscreen.
    • Octisalate / Ethylhexyl Salicylate / Octyl Salicylate: A UVB chemical sunscreen.
    • Octocrylene: A chemical sunscreen that helps stabilize Avobenzone and provides UVB/UVA II protection.
    • Oxybenzone (Benzophenone-3): A chemical sunscreen that provides UVB/UVA I/UVA II protection and helps stabilize Avobenzone.
    • Homosalate: A UVB chemical sunscreen that can also help dissolve other sunscreens.

This list includes the ingredients discussed for achieving the desired properties and formulations mentioned in the thread. Remember to follow the mixing instructions and recommended percentages for each specific product you are making.