Triggering Controlled Release of Fragrance

As a technique to activate the controlled release of fragrance, one’s first thought would probably not be drawn to Trigger, the favorite horse of the American cowboy star Roy Rogers. Nor would that first thought focus on the finger lever of detective “Dirty Harry” Callahan’s Smith & Wesson .44 Magnum revolver (Figure 1). Yet both of these Hollywood “triggers” have two essential similarities with the triggers used to release fragrances in personal care products: The trigger needs to be “holstered”—i.e., held in reserve—until it is needed and it needs to be uniquely designed for the intended reaction and for the environment in which it is to be used.

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