Mixing Procedure for W/O Sunscreen/Base with High Powder Content

Asked by: bbaekhyunee0405 On: October 10, 2021 Product Type: Cosmetics

Question

I have the following formula and would like advice on how to mix it:

  1. Water 36%
  2. [url=http://www.myskinrecipes.com/shop/spf-sunscreen/248-zinc-oxide-nano-%E0%B8%8B%E0%B8%B4%E0%B8%87%E0%B8%84%E0%B9%8C-%E0%B8%AD%E0%B8%AD%E0%B8%81%E0%B9%84%E0%B8%9B%E0%B8%94%E0%B9%8C.html:vf8s8bz4]Zinc Oxide 200nm[/url:vf8s8bz4] EasyDisperse 20%
  3. [url=https://www.myskinrecipes.com/shop/water-in-oil/7661-warp-cream-maker-xl.html:vf8s8bz4]Warp Cream Maker XL[/url:vf8s8bz4] 10%
  4. [url=http://www.myskinrecipes.com/shop/%E0%B8%8B%E0%B8%B4%E0%B8%A5%E0%B8%B4%E0%B8%84%E0%B9%82%E0%B8%99-silicone/171-cyclomethicone-cyclopentasiloxane-%E0%B9%84%E0%B8%8B%E0%B9%82%E0%B8%84%E0%B8%A5%E0%B9%80%E0%B8%A1%E0%B8%97%E0%B8%B4%E0%B9%82%E0%B8%84%E0%B8%99.html:vf8s8bz4]Cyclopentasiloxane[/url:vf8s8bz4] 10%
  5. [url=http://www.myskinrecipes.com/shop/%E0%B8%8B%E0%B8%B4%E0%B8%A5%E0%B8%B4%E0%B8%84%E0%B9%82%E0%B8%99-silicone/1311-trimethylsiloxysilicate-isododecane-film.html:vf8s8bz4]Silicone Film (Long-Wear, Hard, Isododecane Base)[/url:vf8s8bz4] 8%
  6. [url=http://www.myskinrecipes.com/shop/spf-sunscreen/236-titanium-dioxide-nano-%E0%B9%84%E0%B8%97%E0%B8%97%E0%B8%B2%E0%B9%80%E0%B8%99%E0%B8%B5%E0%B8%A2%E0%B8%A1%E0%B9%84%E0%B8%94%E0%B8%AD%E0%B8%AD%E0%B8%81%E0%B9%84%E0%B8%9B%E0%B8%94%E0%B9%8C-%E0%B8%99%E0%B8%B2%E0%B9%82%E0%B8%99.html:vf8s8bz4]Titanium Dioxide 200nm EasyDisperse[/url:vf8s8bz4] 5%
  7. [url=http://www.myskinrecipes.com/shop/make-up-bb-cream/264-bb-micro-silk-silica-%E0%B8%9A%E0%B8%B5%E0%B8%9A%E0%B8%B5-%E0%B8%9C%E0%B8%87%E0%B8%8B%E0%B8%B4%E0%B8%A5%E0%B8%B4%E0%B8%81%E0%B9%89%E0%B8%B2.html:vf8s8bz4]BB Micro Silk[/url:vf8s8bz4] 6%
  8. [url=http://www.myskinrecipes.com/shop/make-up-bb-cream/518-silica-%E0%B8%94%E0%B8%B9%E0%B8%94%E0%B8%8B%E0%B8%B1%E0%B8%9A%E0%B8%84%E0%B8%A7%E0%B8%A1%E0%B8%A1%E0%B8%B1%E0%B8%99%E0%B8%9C%E0%B8%B4%E0%B8%A7.html:vf8s8bz4]Matte Silica[/url:vf8s8bz4] XL 4%
  9. White matte 3%
    10.[url=http://www.myskinrecipes.com/shop/easymix-color/275-yellow-iron-oxides-easymix.html:vf8s8bz4]Yellow Iron Oxides EasyMix[/url:vf8s8bz4] 2%
    11.[url=http://www.myskinrecipes.com/shop/easymix-color/277-black-iron-oxides-easymix.html:vf8s8bz4]Black Iron Oxides EasyMix[/url:vf8s8bz4] 0.5%
    12.[url=http://www.myskinrecipes.com/shop/%E0%B8%AA%E0%B8%B2%E0%B8%A3%E0%B8%81%E0%B8%B1%E0%B8%99%E0%B9%80%E0%B8%AA%E0%B8%B5%E0%B8%A2/1001-ethylhexylglycerin-caprylyl-glycol.html:vf8s8bz4]Mild Preserved Eco[/url:vf8s8bz4] 1%
    Please advise on how to mix this formula. Thank you.

Answer

Yes, the formula you provided can be mixed. It is a Water-in-Oil (W/O) Emulsion formula, which requires high shear mixing equipment to achieve a smooth and stable texture.

Here are the basic mixing steps:

Phase A (Water Phase):

  1. Water (36%)

Phase B (Oil/Silicone/Powder Phase):

  1. Zinc Oxide 200nm EasyDisperse (20%)
  2. Warp Cream Maker XL (10%)
  3. Cyclopentasiloxane (10%)
  4. Silicone Film (Long-Wear, Hard, Isododecane Base) (8%)
  5. Titanium Dioxide 200nm EasyDisperse (5%)
  6. BB Micro Silk (6%)
  7. Matte Silica XL (4%)
  8. White matte (3%)
  9. Yellow Iron Oxides EasyMix (2%)
  10. Black Iron Oxides EasyMix (0.5%)

Phase C (Cooling Phase):

  1. Mild Preserved Eco (1%)

Mixing Procedure:

  1. Prepare Phase B: Combine all ingredients from Phase B in a suitable container.
  2. Disperse Powders/Sunscreens: Use a high shear mixer (e.g., Homogenizer or High-Speed Mixer) to mix Phase B ingredients. Ensure all powders (Zinc Oxide, Titanium Dioxide, Silica, Iron Oxides, White matte) are fully dispersed into the oil/silicone phase containing Warp Cream Maker XL and other silicones until smooth and homogeneous, with no powder aggregates visible. This step is crucial for a smooth texture and good sun protection performance.
  3. Prepare Phase A: Prepare the water phase (Phase A) in another container.
  4. Emulsify (W/O): While continuously mixing Phase B with the high shear mixer, slowly add the water phase (Phase A) into Phase B in a thin stream or dropwise. Adding water slowly under high shear helps Warp Cream Maker XL form a stable W/O Emulsion structure. Continue mixing until all water is incorporated and a smooth, stable emulsion is formed.
  5. Reduce Speed and Cool: Once a stable emulsion is achieved, switch to a lower speed mixer (e.g., Paddle Mixer) and continue mixing while cooling the emulsion.
  6. Add Phase C: When the temperature of the cream drops below 40°C, add Mild Preserved Eco (Phase C) and mix until evenly distributed.
  7. Check consistency and package the product.

Important Considerations:

  • Mixing a W/O Emulsion formula with a high powder load like this requires high shear equipment for proper powder dispersion and emulsion stability.
  • The addition of water in step 4 must be done slowly and continuously while mixing at high speed.
  • Ensure all powders are completely dispersed in Phase B before starting the emulsification step.

If you have any further questions, feel free to ask!

Related Products Mentioned

Cyclopentasiloxane (Low-Odor Cyclomethicone)
Titanium Dioxide 200nm EasyDisperse™ (Dimethicone/Silica Treated)
Zinc Oxide 200nm EasyDisperse™
BB Micro Silk™
BB Micro Silk™
Cosmetics
Yellow Iron Oxides EasyMix™
Black Iron Oxides EasyMix™
MatteSilica 5™ (5 Micron)
Mild Preserved Eco™ (Preservative-Free)
Silicone Film (Comfort-Wear, Hard, Isododecane Base)
Warp Cream Maker™ XL

Tags

Dispersion High Powder Content Mixing Procedure Sunscreen Formulation Water-in-Oil