A new analytical method for the evaluation of cosmetic pigments

A new methodology is proposed for the instrumental evaluation of cosmetic pigments independent of their nature organic or inorganic, focusing on the assessment of its repeatability, reproducibility, and performance. This method involves the use of a silicone‐based dispersion medium that gives an opt...

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Bibliographic Details
Published in:Color research and application 2021-08, Vol.46 (4), p.821-829
Main Authors: Egurrola, Greciel, Segura, Juliette, García, Johnbrynner
Format: Article
Language:English
Subjects:
Beads
color
Colorimetry
cosmetics
Dispersion
method
pigment
Pigments
Quality control
Reproducibility
Spectral reflectance
spectrophotometer
Tinting
Zirconium
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Summary:A new methodology is proposed for the instrumental evaluation of cosmetic pigments independent of their nature organic or inorganic, focusing on the assessment of its repeatability, reproducibility, and performance. This method involves the use of a silicone‐based dispersion medium that gives an optically clear film (YI = 0.90) and a dispersion procedure using a dual asymmetric centrifugal mixer aided with zirconium beads. Finally, a handheld spectrophotometer in a sphere d/8 spin configuration for the evaluation of the Spectral Reflectance Factor, L*a*b*C*h° coordinates, tinting strength, and ΔECMC colorimetric differences. Methodology shows a satisfactory repeatability, reproducibility, and an adequate correlation with the visual test, making this method a proper fit for quality control and meeting consumer color needs in the cosmetic industry.
ISSN:0361-2317
1520-6378
DOI:10.1002/col.22621