100 Women: My brush with the retoucher
14 October 2013 Last updated at 17:22 BST
Airbrushing has long been a part of the fashion and magazine industries, with skin smoothed and blemishes artfully removed for effect.
With the advent of high-resolution digital images, though, the level of detail captured can easily highlight imperfections on even the most natural beauty.
That means retouching has become as much a necessity as a luxury - and can prompt image-conscious celebrities to demand ever-more drastic changes.
In an effort to understand the art of airbrushing, the BBC's Tulip Mazumdar asked London-based fashion photographer Sarah Brimley to demonstrate some of the industry's more extreme retouching techniques.
During October, the BBC's 100 Women season is looking at the lives of women around the world today.
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