Journal of Society of Cosmetic Chemists of Japan
Online ISSN : 1884-4146
Print ISSN : 0387-5253
ISSN-L : 0387-5253
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Volume 46, Issue 2
Displaying 1-4 of 4 articles from this issue
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Special Review
Originals
  • Development of Make-up Removers Consisting of a Bicontinuous Microemulsion
    Miho Kamada, Sayaka Tsuji, Li-Kun Han, Shintaro Fujiwara, Yasuharu Nak ...
    2014 Volume 46 Issue 2 Pages 93-100
    Published: June 20, 2014
    Released on J-STAGE: June 20, 2014
    DOIhttps://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.46.93
    JOURNAL FREE ACCESS
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    In this study, we developed make-up remover preparations comprising a bicontinuous microemulsion using polyglycerol fatty acid esters (PGFE). We obtained the microemulsion by mixing PGFEs with different HLB (hydrophile-lipophile balance) values, then replaced part of the water with polyol and adjusted the relative HLB of the system. Comparison of the phase diagrams of the PGFE and polyoxyethylene (POE)-type nonionic surfactant in the oil and water showed that PGFE formed an I-phase region in a wide temperature range even at low concentrations. This indicated that the HLB of PGFE was not susceptible to the effect of temperature, unlike that of a POE-type nonionic surfactant. In the actual test, the features of the preparations using the bicontinuous microemulsion were evaluated. Taking into consideration that make-up removers are used even around the eyes, we performed an eye irritation test and obtained results indicating that safety was high. Thus, by using PGFE, we obtained a microemulsion with little temperature dependence even at low concentrations of the surfactant and were able to develop preparations that combined high functionality, usability, and safety.
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  • The Internal Structure of Hair Observed Using a Differential Phase Contrast Scanning X-Ray Microscope
    Takafumi Inoue, Kouji Takehara, Kenji Kizawa, Takeshi Fujimori, Akihis ...
    2014 Volume 46 Issue 2 Pages 101-107
    Published: June 20, 2014
    Released on J-STAGE: June 20, 2014
    DOIhttps://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.5107/sccj.46.101
    JOURNAL FREE ACCESS
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    Although observations of the intact structure of human hair have been performed using various X-ray micro-tomography systems, it has been found difficult to obtain fine images due to the low sensitivity of those systems. In the present study, we utilized a differential phase contrast scanning X-ray microscope to observe the inner microstructure of hair in greater detail without prior sample processing. Permanent waving treatments induced micrometer-scale void structures within the cortex, while slender void structures were observed between the cuticle scales. Although such structural defects were not induced by bleach treatment, the structures of the overlapped laye (i.e., cuticle cellular boundary) become unclear. The present imaging technique clearly displayed different appearances of hair damage induced by permanent waving and bleach treatments.
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