50% shea butter + 30% carrier oil + 20% zinc oxide powder. The basic procedure is simple: melt the shea butter, add the oil and zinc oxide, whip them together, let the preparation solidify in the fridge, then give it one more whip to add some volume and to make it easy to scoop or pour into your container. Although you won’t be able to test Best Sunscreen for Hawaii for Kids. 3. Badger 30 SPF Sunscreen. Badger sunscreen is a broad-spectrum mineral sunscreen lotion developed especially for kids that are outside enjoying the sunshine. It is made from 98% organic ingredients, and it’s GMO-free, nano free, and biodegradable. Be careful! ‘Reef friendly’ is not a regulated phrase. Any product must be entirely free from all of the below: Oxybenzone Octinoxate Octocrylene Homosalate 4-methylbenzylidene camphor PABA Parabens Triclosan Any nanoparticles or “nano-sized” zinc or titanium (if it doesn’t explicitly say “micro-sized” or “non-nano” and it can rub in, it’s probably nano-sized) Any form of Sunscreen: Nanoscale titanium dioxide becomes transparent to visible light while serving as an efficient UV light absorber. Because the particle size is so small, nano-titanium dioxide does not reflect visible light, but does absorb UV light, enabling a transparent barrier that protects the skin from the sun’s harmful rays. Non-nano sunscreens are more likely to leave a white cast on the skin, making them less appealing to some users. In summary, the nano vs. non-nano debate in mineral sunscreens encompasses a range of factors, including cosmetic appeal, effectiveness, safety, and environmental impact. Background: Solar UV radiation (UVR) is composed of UVB (290-320 nm) and UVA (320-400 nm) wavelengths. Only two sunscreen active ingredients approved in the US, avobenzone (butylmethoxydibenzoylmethane) and zinc oxide (ZnO), provide true broad-spectrum protection against UVA wavelengths >360 nm. Heat water to a simmer. Melt all ingredients completely, stirring well to combine. Remove the pitcher carefully from the hot water. Allow sunscreen to cool slowly, stirring periodically. Once sunscreen has started to thicken but is still pourable, pour it into a glass container or silicone squeeze tube. ZnO and TiO 2 have been used in sunscreens since the 1980s. 9 Normally, ZnO and TiO 2 range in size from 200-400 nm and 150-300 nm, respectively. 7 The larger particle size accounts for the white, chalky texture on the skin's surface as these particles reflect incident visible light, which is perceived by the retina as white. 3 Nanoparticles qUZkczK.