It’s pretty unflattering to begin with – but sometimes you can’t control the lighting. Shiny mica, shimmer and glitter will also get shinier with a flash. Titanium dioxide and zinc oxide, two physical sunscreen ingredients, can cause a whitish glow (which makes sense, since their ability to scatter light is partially responsible for their sunscreen ability!) – but not always. Some other ingredients that are white or reflective can also pick up light and cause lightened areas, but usually to a lesser extent. I’m never doing this again.īecause silica has so many surfaces (a bit like a mirrored disco ball), if you have enough on your face, there will always be a whole bunch of surfaces ready to pick up that flash and throw it back at the camera – hence the white flashback. oily patches) directly facing the flash, without any flashback-causing ingredients. The harsh, front-on, white light of a flash is already pretty notorious for causing white patches on any mildly reflective surfaces (e.g. It’s also fantastic for diffusing light – all the tiny surfaces scatter light at different angles, giving a blurry, matte texture, making your skin look flawless on HD video (hence the HD label). This means that it’s great as a microscopic sponge for soaking up oil (kind of like activated charcoal but colourless). (Note: silica is not the same as silicon and silicone!) The silica used in makeup is fumed silica, a type of amorphous silica which has been processed to give it a large surface area. The harsh white markings are caused by silica, an ingredient in many translucent powders, particularly those labelled as “HD”. 3 Things that don’t work well What causes make-up flashback?
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