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Zinc Oxide/Physical Sunscreen List - Page 88

post #1741 of 2638

KristyC, what kind of zinc oxide did you buy to make your DIY sunscreen?

 

I can't tell the difference between micronized, micronized uncoated vs coated ...

 

http://stores.skinessentialactives.com/-strse-Sun-Protection/Categories.bok

 

http://www.gardenofwisdom.com/catalog/item/7000431/3906462.htm

 

http://www.makingcosmetics.com/Sunscreens/Zinc-Oxide-Micronized-Coated-p1004.html

 

The last offering says that the sizing is < 200 nm - does that mean it's the (dangerous) nano kind?

 

Is it coating or sizing of the particles that makes it sink in clear?

Still thinking about a new regimen ...

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Still thinking about a new regimen ...

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post #1742 of 2638
Quote:
Originally Posted by Monocled Penguin View Post



BTW: Is it really OK for all these brands (Devita, Osmosis, etc) to offer ZnO sunscreens at such low percentages; 13.5%, 14%, etc? Or are you guys reapplying more often?

Its a good question and as I said before, there are other things that can augment UV protection besides the physical ones like zinc oxide. Osmosis uses a lower percent of zinc to make Shelter completely sheer, even for ethnic skin, but they use algae which protects over UVA and UVB and blue light range to cover the full spectrum. This is how Eileen from Osmosis words it:

"Red algae is the only living organism that can absorb UV and serve as a
protective filter thus protecting other cells from harmful damage and free
radicals. We combine the red algae and other antioxidants with the zinc
oxide and achieve a 30 Sun Protection Factor and complete coverage for UVA
and UVB in our Shelter product. It is referred to as HelioGuard 365 and I
have attached a more detailed document.
Regards,

Eileen"

I still reapply q2h while outside - still sheer not caky or greasy.

You need more power than a milk frother to mix a high % of zinc oxide into a SS tho. Something like a blender stick helps.
post #1743 of 2638

I got it from sea. It was coated micronized. I don't remember the size of the particles. I can't tell the difference between them either. Its hard for me to tell if a sunscreen is working because I have allot of red undertones in my skin. I stay out of it as much as possible. If I have to go outside I do so later in the day and wear sunscreen. Regardless of how good the ss is it still only offers some protection. Protective clothing and sun avoidance is the best but it isn't always practical.

"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
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"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
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post #1744 of 2638

IMO it depends on your skin type, lifestyle, local climate, indoor or outdoor job/ hobbies, shiftwork or 9-5, drive/ cycle/ walk/ use public transport, beach holidays or ski-ing ... official guidelines are about avoiding skin cancers, not so much the chronic low levels of UV that contributes to ageing, so skincare companies may offer different products to each group.

 

"Another way to look at it is in terms of percentages: SPF 15 blocks approximately 93 percent of all incoming UVB rays. SPF 30 blocks 97 percent; and SPF 50 blocks 98 percent. They may seem like negligible differences, but if you are light-sensitive, or have a history of skin cancer, those extra percentages will make a difference. And as you can see, no sunscreen can block all UV rays. ....

What type of sunscreen should I use?

The answer depends on how much sun exposure you're anticipating. In all cases we recommend a broad-spectrum sunscreen offering protection against both UVA and UVB rays. Many after-shave lotions and moisturizers have a sunscreen (usually SPF 15 or greater) already in them, and this is sufficient for everyday activities with a few minutes here and there in the sun."

http://www.skincancer.org/prevention/sun-protection/sunscreen/sunscreens-explained

 

BTW Devita offer the Rx Ultrasolar 50 which contains 8% titanium dioxide and 19% zinc oxide. Their Body Block 30 and the Solar Protective 30 are both 19% zinc according to the Essentialdayspa store.
 

 

Quote:
Originally Posted by Monocled Penguin View Post

BTW: Is it really OK for all these brands (Devita, Osmosis, etc) to offer ZnO sunscreens at such low percentages; 13.5%, 14%, etc? Or are you guys reapplying more often?



 

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
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"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
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post #1745 of 2638
Quote:
Originally Posted by Firefox7275 View Post

Many after-shave lotions and moisturizers have a sunscreen (usually SPF 15 or greater) already in them, and this is sufficient for everyday activities with a few minutes here and there in the sun."
http://www.skincancer.org/prevention/sun-protection/sunscreen/sunscreens-explained

Ya but the chemical screening ingredients in aftershave and moisturizers (and makeup) actually cause more damage than they prevent: free radicals are the enemy generated by degradation of these chemicals in UV light. Otherwise, I agree about the cumulative exposure.
post #1746 of 2638

I was showing an 'official' attitude to lower SPF products, I don't use or recommend chemical sunscreen agents any more than you do. thumbsup.gif Do they cause more damage than they prevent?

 

Quote:
Originally Posted by fawnie View Post


Ya but the chemical screening ingredients in aftershave and moisturizers (and makeup) actually cause more damage than they prevent: free radicals are the enemy generated by degradation of these chemicals in UV light. Otherwise, I agree about the cumulative exposure.


 

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
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"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
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post #1747 of 2638
Gotcha! And they would be "officially" wrong then!
post #1748 of 2638

Is there something about Titanium Dioxide in ss? I tend to avoid it but I don't remember why. Its in allot of things. I want to make my own mineral foundation for instance and every recipe I've found has TD.

"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
Reply
"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
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post #1749 of 2638

Compared to zinc oxide, it's harder to make transparent products (more reflective) and it has a reputation for generating free rads while zinc oxide acts as an antioxidant. It is in most DIY recipes particularly BECAUSE of it's opacity I would imagine.

 

I'm sure there's more than that and I'm just forgetting. Someone else better versed will chime in, though.
 

Quote:
Originally Posted by KristyC View Post

Is there something about Titanium Dioxide in ss? I tend to avoid it but I don't remember why. Its in allot of things. I want to make my own mineral foundation for instance and every recipe I've found has TD.



 


Edited by Chlorophyll - 4/2/12 at 9:26am
post #1750 of 2638
Unless titanium dioxide is coated it is a photocatalyst.

Osmosis is coming out this spring with a titanium -free mineral makeup line.

http://www.osmosisskincare.com/Colour.aspx
post #1751 of 2638

sunshine.gif

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
Reply

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
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post #1752 of 2638
Quote:
Originally Posted by Firefox7275 View Post

sunshine.gif

cool.gif
post #1753 of 2638

233574885_8aa7c0a4c1.jpg

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
Reply

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
Reply
post #1754 of 2638
6a00d8341d9c7853ef011570551c09970c-500pi
post #1755 of 2638

Now I know the thought police are real ..... innocently on Google Images looking for kitties and sunscreen, guess which oh so familiar face should pop up? SCT's very own and very lovely Dempeaux. jawsdown.gif I'm not going to post the picture cuz that is a bit rude without asking. Check out her before and afters from a few year or so of using proven actives, dear lurkers, including pictures comparing her sun damaged to not sun damaged side.

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
Reply

 

"In the year of our Lord 1903, in the meat packing plants off the shores of the sea, Stood a young man at his slaughter post a newby by his side, He said grind it up and ship it out doesn't matter what's inside, With poison bread to kill the rats, an effective tool of trade ..." Flatfoot 56
Reply
post #1756 of 2638

So cyoot kitties!  Uh, Fawnie is that new avatar the REAL you??? N_O_T!!!!!!!jawsdown.gifrofl.gif

post #1757 of 2638

TD makes me itch,very irritating.frown.gif

post #1758 of 2638
Quote:
Originally Posted by Firefox7275 View Post

Now I know the thought police are real ..... innocently on Google Images looking for kitties and sunscreen, guess which oh so familiar face should pop up? SCT's very own and very lovely Dempeaux. jawsdown.gif I'm not going to post the picture cuz that is a bit rude without asking. Check out her before and afters from a few year or so of using proven actives, dear lurkers, including pictures comparing her sun damaged to not sun damaged side.


Oh mY Gosh her skin is flawless, so even and she looks so young and fresh...amazing. Thanks for posting this.

 

I want to have a glowing and even complexion, not high yellow just golden and healthysmile.gif

 

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I want to have a glowing and even complexion, not high yellow just golden and healthysmile.gif

 

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post #1759 of 2638

Anyone know what SPF a 25% zinc oxide ss would be. How is that figured?

"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
Reply
"The best thing to give your enemy is forgiveness; to a friend; your heart, to your child, a good example, to a father, deference; to your mother, conduct that will make her proud of you; to yourself, respect, to all men, charity" Francis Maitland Balford
Reply
post #1760 of 2638

It would be approximately SPF 30-32, but you can't be exact unless you have it tested specifically, and there are certain limitations to the test.  Having said that, it really doesn't matter what the SPF is after 30, because you're already getting > 97% protection from the UVB rays and excellent protection from UVA.

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