In Silico Spectral Color and Appearance Rendering of Fine Fragrances

Contact Author Rutger M.T. van Sleeuwen, materials science R&D, Firmenich
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Fine fragrances with excellent color constancy are desired, since such liquids will generally have the intended appearance regardless of viewing conditions.

In the first part of this article series (part 1), a spectral color and appearance rendering technique for fragrances in bottles was introduced. In this second part, it is demonstrated that this technique could be used to predict colored fragrance mixtures and help to reduce the ill-effects of common color phenomena such as metamerism and color inconstancy.

Colored Fragrance Mixtures

In part 1, the measured absorbance spectra of fine fragrance liquids were used to fill computer-generated fragrance bottles with virtual liquids for color and appearance prediction. This technique still required a measurement of the absorbance spectrum of a fragrance. The approach would be more powerful if these absorbance spectra could be predicted using established color mixing models to visualize many different color formulations with little or no experimental lab work. We will test the appearance of a predicted color mixture based on Lambert-Beer’s law and compare this against a photograph of the physical bottle filled with the colored fragrance mixture.

For the full article, please check out Perfumer & Flavorist's December 2020 issue.

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