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KMID : 0604520050310010059
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Journal of the Society of Cosmetic Scientists of Korea
2005 Volume.31 No. 1 p.59 ~ p.64
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A Study on the Sensory Tests Correlated Objective Measurements for the Gloss and Gloss-lasting Capability of Lipstick
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Kim Kyung-Nam
Kim Yoon-Jung
Lee Hwa-Young
Kim Eun-Jung
Cheon Ji-Min
Kang Hak-Hee
Lee Ok-Sub
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Abstract
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In case of lipsticks, observer’’s subjective sensitivity has been the main index to estimate gloss and gloss-lasting capability. The glossmeter has been applied to measure the gloss of make-up cosmetics like nail enamel, however is not effective for lipstick because of uneven sampling. Also gloss-lasting capability couldn’’t have been measured. In this study, we optimized measurement methods of gloss and gloss-lasting capability of lipsticks, which are highly correlated to subjective sensory tests. We set up the standard methods of gloss measurement by changing application conditions, for example, materials, sizes and application number of times and so on. And we introduced optimizing measurement system, in which shaking speed and temperature were controlled to measure gloss-lasting capability. Applying our methods, the gloss values were very close to the results of sensory tests, and we could express the gloss and gloss-lasting capability of lipsticks numerically Repeatability and reproducibility of our methods were certified by six-sigma statistical tool.
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KEYWORD
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gloss, gloss-lasting, lipstick, make-up, six-sigma
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