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Mineral sunscreen
Hello chemists and formulators,
I have a question about sunscreen. I want to make a mineral sunscreen using zinc oxide and titanium dioxide.
But I have a question about the type of emulsification that will make Zinc Oxide effective.
As far as I know, but I’m not sure, if we do a water-in-oil emulsification, that will make the Zinc Oxide effective.
But if we make an oil-in-water emulsification, the zinc oxide can migrate into the water, reducing its effectiveness, and this migration can be stopped by adding a water-in-oil type liquid emulsifier to that type of emulsification (Oil in water) is that right?
Can I do an oil-in-water emulsification using only an oil-in-water emulsion?
will the zinc oxide be effective in this case?
Thank you.
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4 Replies
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Hello chemists and formulators,
I have a question about sunscreen. I want to make a mineral sunscreen using zinc oxide and titanium dioxide.
But I have a question about the type of emulsion that will make Zinc Oxide effective.
As far as I know, but I’m not sure, if we do a water-in-oil emulsion, that will make the Zinc Oxide effective.
But if we make an oil-in-water emulsion, the zinc oxide can migrate into the water, reducing its effectiveness, and this migration can be stopped by adding a water-in-oil type liquid emulsifier to that type of emulsion (Oil in water) is that right?
Can I do an oil-in-water emulsion using only an oil-in-water emulsifier?
will the zinc oxide be effective in this case?
Thank you.
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You will never be able to make sunscreen at home.
Sunscreen works by creating an even layer on your skin. It is not about the amount of oxides, it is about even distribution of nano particles. For this you need really high end equipment and knowledge. Even if you smear pure zinc oxide on your skin it will give you spf 5 top.
So drop this idea and buy one.
More detailed explanation: https://www.youtube.com/watch?v=wCPp8EJSG-Y
Also, mineral sunscreens are not totally mineral per se and contain unregulated SPF components: https://www.youtube.com/watch?v=_Lcakmug-c0
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Yeah I know that home sunscreens are not easy to make because you can’t get the right SPF.
But I want to make an SPF test in a lab so I’m asking about the type of emulsion so that the zinc oxide can give a good efficacy and protect from sun.
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As I said it doesn’t matter what your base is because you don’t have right equipment to disperse the filters. It is just out of reach for DIY. So I promise your result will be 100% failure no matter what DIY technique you have in mind. And since the reliable testing for SPF costs a lot and burns real persons I would strongly encourage you from doing DIY sunscreen because it will fail, you will loose money and hurt people for nothing.
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