[Misc] UV Camera Tests, 1/8 tsp application, titanium dioxide

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UV Camera Sunscreen Tests https://imgur.com/gallery/yVG1XI got a request to see what half the daily recommended sunscreen amount looks like under a UV Camera. I could absolutely see a difference between the 1/4th and 1/8th tsp application. The coverage was a lot more uneven and spotty despite the same patting-on technique.The first picture my skin looks jet black. In the second, with 1/8th, it looks lighter and you can see the uneven black texture.I also got a request to try mineral sunscreen on top as some wear makeup over their sunscreen. The closest thing I had with sephora's face powder with titanium dioxide.I applied the powder to a spot on my cheek about five minutes after the sunscreen application. To my surprise, you can actually see exactly where I applied it. You can see the color difference in one cheek versus the other.That said, I think we need someone else's opinion. Chemical sunscreens like avobenzone, the main one on the sunscreen I am wearing, absorb UV rays. This is why it looks darks, it's absorbing the rays. Titanium dioxide and zinc oxide work by reflecting UV rays. I believe this means it should look white under a UV Camera and all the UV light is reflected.So the lightness we are seeing could be UV being reflected. I do not think this is the case for two reasons. One, this foundation is not marketed with SPF leading me to believe it's not the type needed for SPF. It also appears lightened, not white. In the UV pictures I've seen of UV reflectors, it is starkly white just like UV absorbers are starkly black even with inadequate amount.We could test this with a powder only application, unfortunately I used the last of my powder for the approve test...Also, included is a picture outlining two spots I often miss in my sunscreen application. I didn't know this until I got this camera..TLDR: 1/8th tsp doesn't appear to be enough for max protection, powder on top of sunscreen affects the sunscreen but more testing needed to understand how its being affected.
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Submitted by YayBudgets