With the 4th of July coming up soon, plenty of you are probably going to be spending time in the sun. Instead of buying bottle after bottle of sunscreen, make your own.WonderHowTo has a brief guide on how to make your own sunscreen. The key ingredient here is the zinc oxide. In sun screen, zinc oxide is used to scatter light waves in the UV-A spectrum. As Physics.org explains:The recipe provided may not have as great of a shelf-life as store-bought sunscreen, but you can get the ingredients for fairly cheap and make several batches from them. Check out WonderHowTo for the full recipe.How to Make Your Own Non-Toxic Sunscreen at Home | WonderHowToSunscreens help to filter out UV radiation using a combination of two main types of active ingredients. Inorganic particles, such as titanium dioxide or zinc oxide, form a physical barrier, reflecting or scattering UV waves. Organic components meanwhile absorb UV rays and release their energy as heat.
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