Lip has a characteristic skin compared with other part of skin. The studies on lip skin are quite a few. To investigate the seasonal change of lip condition, same evaluation methods were applied, such as analyzing photographs of lips, measuring moisture content with impedance meter, measuring color with color and color difference meter and taking surface temperature.
These evaluation methods were applied to 35 women (the average age is 32.8 years old ranging from twenties to fifties), and executed six times in a year; september, November, January, April and June. As the results, the followings are proven: lip becomes chapped not only in the winter time but in around June, and its moisture content certainly decreases in the winter time. The younger women's lips get chapped more easily. The group of a high moisture content and low transepidermal water loss (TWL) is significantly less chappy. The group of a lower surface temperature than average is significantly chappy.

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Nowadays lipsticks, which are made propaganda for their “long-lastingness”, are extending the market. Purposing to develop lipsticks, we must have a knowledge of classification for products by “lipstick-lasting”, the evaluation method of it, and others.
However, there are few studies on “lipstick-lasting”, and we had not established the evalvation method yet. Then, we aimed at clarifying the evaluation structure of “lipstick-lasting”from a viewpoint of the sensory test. In an experiment, we chose 63 lipsticks from the market, and expert panels evaluated their “lasting” for two hours. Moreover, we analyzed this data by the Principal Component Analysis as two ways model (8*504). In result, we found that “lipstick-lasting” can be evaluated from two factors, “Decrease” and “Breakdown”.

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The purpose of this study was to evaluate the ability of magnesium ascorbate phosphate in combination with tocopheryl acetate to prevent free radical induced lipid peroxydation in an in vitro biological system, and to develop formulations of various skin care cosmetics containing magnesium ascorbate phosphate.
Irradiation by ultraviolet light in the UVB and UVA induces free radical formation, which in turn results in lipid peroxydation. This analysis measured malonyl dialdehyde (MDA), an active end product of lipid peroxydation, levels in the slc-Wister rat model. The MDA levels decreased considerably with increasing concentrations of magnesium ascorbate phosphate in combination with tocopheryl acetate. The addition of 2mM magnesium ascorbate phosphate resulted in a 33% decrease in measured MDA levels from the addition of 0.2mM tocopheryl acetate alone. These results may suggest that magnesium ascorbate phosphate have substantial synergistic effects with tocopheryl acetate in reducing MDA levels.
Behavior of magnesium ascorbate phosphate in aqueous media was also investigated. Phase inversion temperature in an emulsion system and clouding point of ethoxylate nonionic surfactant aqueous solutions were lowered by adding magnesium ascorbate phosphate. These tendencies were the same as with the addition of sodium chloride and magnesium chloride.
Formulations of various skin care cosmetics were developed by studying effects of magnesium ascorbate phosphate on emulsions and liposomes.

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A disposable ultraviolet sensor has been developed, which provides a convenient way of measuring the irradiated dose of UV-rays without a particularly skilled technique.
The ultraviolet sensor consists of a first rayer comprising a photo activator forming a free radical by irradiation of UV-rays and a discoloring agent exhibiting a color change in visible range of spectrum through the action of this free radical, a second layer comprising a ultraviolet absorber, and a third transparent protective layer on a support.
The color of the ultraviolet sensor changes corresponding to the irradiated dose of UV-rays and the discoloration has high sensibilities to only ultraviolet range of spectrum. And the ultraviolet sensor is waterproof and stable at 0°C to 50°C under light shielding.
Next, using the ultraviolet sensor, the irradiated dose of UV-rays on vertical plane to the ground has been investigated under several environmental conditions. As man's face locates almostvertically to the ground, the irradiated dose of UV-rays on a face seems to be almost equal to that on vertical plane to the ground.
The irradiated dose of UV-rays on vertical plane to the ground under ground conditions (namely reflective surface) such as soil, turf, asphalt and concrete was about 30% of that on horizontal plane at noon when the sun's altitude was high, and was about 45% in the middle afternoon when the sun's altitude was relatively low. And on the surface of snow the abovementioned value was 72%, which was very large.
Furthermore, the ultraviolet sensor has enabled us to evaluate a ultraviolet absorber in high concentration (practically used in cosmetics) by measuring the transmitted dose of UV-rays.
Using a SE lamp as a UVB light source and a BLB lamp as a UVA light source, extinction coefficients of two ultraviolet absorbers, Parsol A and Escalol 507, have been investigated. Extinction coefficients in ethanol (E_0.01%^1mm) of Parsol A were 0.30 (SE lamp) and 0.76 (BLB lamp), and those of Escalol 507 were 0.46 (SE lamp) and 0.13 (BLB lamp) respectively.
These results demonstrated that Parsol A showed a much superior UVA protection effect to that of thc conventional Escalol 507. Usually an ultraviolet absorber evaluates by its absorbance measured in its dilute solution without intermolecular interaction (usually 10ppm), but these results also suggested a possibility of an ultraviolet absorber's showing an enough UV protection in high concentration practically used in cosmetics, although it had a relatively small absorbance in its dilute solution.

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The majority of antiperspirants and deodorants in the market are formulated by ingredients that act in such a way that the production of body odour is prevented as much as possible.
A new type of deodorant that acts directly on chemical compounds responsible for offensive body odours once formed, was investigated. First of all, by analysing foot odour with GC/MS, short chain fatty acids, especially iso-valeric acid, were found to be responsible for the malodour. Short chain fatty acids were also identified within the armpit, another region possessing offensive body odour.
Various experiments confirmed us that the conversion of volatile short chain fatty acids into involatile short chain fatty acid salts was the mechanism of choice for quenching acid malodour. A number of compounds were sought, out of which zinc oxide possessing fine particles was the most promising in terms of its outstanding ability to efficiently quench iso-valeric acid.
By uniformly covering the surface of a spherical resin such as nylon, with zinc oxide, a hybrid powder that overcomes many of the shortcomings that zinc oxide alone may provoke, was obtained without sacrificing any of zinc oxide's deodorizing power. Body odour quenchers formulated with this hybrid powder were far more efficacious compared to the conventional deodorizers.

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In order to realize the property of low obstruction against cutaneous respiration, we developed the ceramic powder of porous discshaped particles.
This powder was obtained by burning of a mixture containing Kaolin, Talc and the burned diatomaceous earth as a main material.
In addition to the above-mentioned properties, we found out some other properties, i.e. superior mechanical strength, high oil absorption and radiating activity of “FAR Infrared ray”.

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