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Volume 42 (2008)
- Issue 4 Pages 285-
- Issue 3 Pages 185-
- Issue 2 Pages 81-
- Issue 1 Pages 2-
Volume 42, Issue 4
Displaying 1-6 of 6 articles from this issue
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Tetsuo Yamaori2008 Volume 42 Issue 4 Pages 285-288
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESS -
Akira Ishikubo, Akira Noda2008 Volume 42 Issue 4 Pages 289-296
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThermal behavior on skin surface during application of cosmetics is one of important factors of tactile feelings. A new evaluation system to measure the thermal behavior on surfaces during application was developed, and the influences of components of cosmetics on thermal behaviors were investigated. The relationship between this thermal behavior and one tactile feeling, freshness, was investigated as well. As a result, it was shown that the thermal behavior during application depended on the amount of water, ethanol, moisturizer, fatty alcohol, the kind of polymers and their compositions. It was also found that a parameter consisting of maximum decrement in temperature and initial speed of decreasing temperature showed a good correlation with the tactile feeling of freshness.View full abstractDownload PDF (1100K) -
Tomohisa Fukuhara, Teruhiko Oouchi, Tsutomu Kamata, Kazuo Inoue, Sayak ...2008 Volume 42 Issue 4 Pages 297-304
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSPolyglycerol fatty acid esters (PGFE), a food grade emulsifier has been used in cosmetic products in recent years due to its safety and low stimulation of skin. Cosmetic formulation containing CoQ10 to provide a stable and clear preparation is difficult because it has a high crystalline property. We have tried the development of CoQ10-soluble preparation with PGFE applied for cosmetics. The present study is summarized as follows: This CoQ10-soluble preparation has a bicontinuous microemulsion structure that provides high solubilization capacity and thermodynamic stability. Cosmetics using this CoQ10 soluble preparation tend to improve the skin permeability and also to involve the change in skin conditions (moisturization and elasticity), compared to the non-bicontinuous microemulsion preparation.View full abstractDownload PDF (1861K) -
Takehito Imai, Masanao Niwa, Takuya Hasegawa, Hideto Kawamura, Tomonar ...2008 Volume 42 Issue 4 Pages 305-312
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSThe mechanism of oxidative hair dyes (permanent hair color) in cuticle layers of human hair was studied. In general, it is considered that the oxidative hair dye deposits monomer into the cortex, and is polymerized with coloring in there. It was confirmed that not only cortex but also cuticle layers were dyed with the permanent hair color, through observation with the thin crosssection of the dyed hair. There were exogenous metals in the cuticle layers from tap water, etc., and the transition metals increased the dyeing and decreased the bleaching. It was thought that the activity of oxidation reaction with hydrogen peroxide was increased in the cuticle layers, and permeability to the cortex was decreased. Furthermore, TEM findings suggested that the oxidation hair dyes mainly reacted in the β-layer/δ-layer interface in the cuticle layers, unevenly distributing the metals in the β-layer of cuticular CMC.View full abstractDownload PDF (4918K) -
Keiji Igarashi, Keisuke Sagara, Junichiro Egawa2008 Volume 42 Issue 4 Pages 313-318
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSA Water-in-Powder cosmetic is one encapsulating a large amount of water with powders. In this study we explain why the cosmetic is possible. First we focused on hydrophilic and hydrophobic balance of nano-sized powder surface. We looked into the surface state of powders with the gas adsorption test and discovered the functional powders that have the optimized balance of hydrorepellency due to fractal surface and hydrophilicity due to free hydroxyl groups. By using this material, we created a new powder technology that can encapsulate a large quantity of water stably. We also looked into how the powders encapsulated water by observation with wet-SEM and how the encapsulated water is stabilized by measuring water mobility with 17O-NMR. As a result, we developed a new technology with water and powder. By encapsulating a large amount of water, we achieved a cosmetic with many unique characteristics: the powder cosmetic can change into liquid by application of friction on skin, it gives us comfort in use and provides a watery, cool feel. It also provides excellent makeup function by spreading smoothly on skin to form a uniform makeup coating.View full abstractDownload PDF (3575K) -
[in Japanese], [in Japanese]2008 Volume 42 Issue 4 Pages 319-323
Published: December 20, 2008
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSDownload PDF (2609K)
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