By  on June 1, 2009

Few women wash their hair around the clock or spend hours on end in tanning booths. But simulating such conditions in the name of better dyes is part of the research and development picture at L’Oréal, a sprawling department spanning such diverse scientific disciplines as biology, chemistry and medicine and devoted to breakthroughs at the molecular level.

“There are often more than 50 different disciplines involved in one product,” says Jean-François Grollier, who has headed the company’s R&D activity for two decades, ticking off toxology, biology, optometry and microbiology — to name but a few. “During the elaboration of a product, each participates at a given moment.”

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