The ‘beautiful love affair’ between Catherine Deneuve and YSL


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At his fashion shows, Deneuve always sat front and centre in the private clients’ row, supporting her friend and wearing his couture designs, which he made especially for her. The star was his first customer at his new Prêt-à-Porter store, Rive Gauche, when it opened in 1967, and remained Saint Laurent’s muse until his death in 2008.

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How Prussian blue changed everything


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Not my favorite color.

The creation of Prussian blue was the result of a simple error by two German alchemists, Jacob Diesbach and Johann Konrad Dippel. While mixing a batch of cochineal red, Diesbach was alarmed to discover that his concoction had turned a deep blue. After much investigation, he determined that this was the result of a chemical reaction caused by animal blood found in contaminated potash provided by Dippel. The world’s first synthetic pigment was born.

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