• Proceedings of the SCSK Conference
• /
• 1992.09a
• /
• pp.97-114
• /
• 1992

In these days sun products are developed and produced by the cosmetic scientists in the world. Peoples need strongly to protect themselves from the hazardous UV rays dued to the destruction of ozone layer. Therfore, we, cosmetic scientists must have an effort to produce the more effective goods. In this article the market survey of sun-products as well as the currency of sunscreen agents was investigated. It was found that Benzophenone - 3 and Ocytyl methoxy cinnamate were widely used. The lotions, using Benzophenone - 3 as the chemical agents, and TiO$_2$and micro TiO$_2$ as the physical agents, were measured the UV-Spectrum in the Dilution and Application method. Photoprotective activity of chemical agents can usually be measured in solution state. However, that of the insoluble physical agents such as TiO$_2$is hardly measured in this state. Photoprotective ability of the insoluble physical agents was able to be measured by application of lotions to the surface of UV cells. It was found by this method that micro TiO$_2$showd stronger UV scattering effect than TiO$_2$in this method.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.35 no.1
• /
• pp.1-9
• /
• 2009

South Asian's growing obsession with fair skin has made the cosmetic industry into a multibillion-dollar trade over the last decade alone. With reports of toxicity and potential mutagenicity of conventional skin lightening agents, cosmetic industries are looking for plant-based skin whitening formulations. In this review some potential depigmentation agents from South Asian region are discussed, including their historical background, biochemical characteristics and recent findings on their depigmenting activity.

• Polymer(Korea)
• /
• v.33 no.5
• /
• pp.441-445
• /
• 2009

In order to develop an intelligent delivery system for cosmetic active agents (e.g., arbutin, ascorbic acid, and adenosine), pH-responsive P(MAA-co-PEGMA) hydrogel particles having an average size of approx. $2{\mu}m$ and spherical shape were synthesized via dispersion photopolymerization. There was a drastic change in the swelling ratio of P (MAA-co-PEGMA) hydro gels at a pH 5, which is the $pK_a$ of the hydrogel. To determine the factors that have an effect on the loading of cosmetic active agents into the hydrogel, the loading efficiency of the active agents was investigated at various MAA and EG compositions of the hydrogel and the loading pH conditions. When the MAA contents in the hydrogel decreased, the loading efficiency of the active agents increased. In loading experiments with different pH conditions, the active agents showed higher loading efficiency into the hydrogel at the pH where the hydrogel was at the swollen state than at the pH where the electrostatic repulsion was minimized.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.26 no.2
• /
• pp.25-40
• /
• 2000

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.36 no.1
• /
• pp.47-55
• /
• 2010

UV-screening agents have some adverse effects that raise consumers' concern. The organic agents often cause irritation and may penetrate into human body while the inorganic agents raise aesthetic issues because they often turn opaque. Organic agents with high molecular weights and nano-sized inorganic agents have been developed respectively to minimize transdermal intrusion into human body and suppress turning opaque. Recently, we reported preparation of powdery UV-screening agents made of polysilsesquioxane, an organic-inorganic hybrid material. Powders would not penetrate into epidermis and organic-inorganic hybrid nature would suppress the opaqueness problem. In this study, we continued our research on this powdery polysilsesquioxane UV-screening agent, SESQUV, regarding its chemical composition, its synergic UV-screening effects when mixed with other organic agents, and its applicability in practical formulation. Results showed SESQUV was promising UV-screening agents useful in sunscreen formulation.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.22 no.2
• /
• pp.124-131
• /
• 1996

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.24 no.3
• /
• pp.81-88
• /
• 1998

The aim of this study is to evaluate several plant extracts with a view to developing UV sunscreen agents. In this study, 150 plant extracts were screened to elucidate their UV spectra using spectrophotometric method. Several plant extracts such as Phellodendron amurense, Morus alba, Rhododendron mucronulatum, Brassica alba have strong absorbency at UVA region (350nm), the suntanning wavelength. And Sophora flavescens, Caesalpinia sapper, Morus alba, Phellodendron amurense, showed absorption plateau value at UVB region (308nm), the erythema action wavelength. These extracts have a good absorbency property as synthetic filter and could be served as substitutes for synthetic UV sunscreen agents.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.44 no.1
• /
• pp.1-7
• /
• 2018

In this study, 1,2-hexanediol, ethylhexylglycerin, and glyceryl caprylate known as skin conditioning agents with antimicrobial activity in cosmetics were investigated for their antimicrobial activity against gram-positive and gram-negative bacteria when combining them with various ingredients in cosmetic formulations. Seven kinds of substances expected to improve the antibacterial activity in formulations were selected to blend with these three compounds.; 1,3-propanediol, 1,3-butanediol, glycerin, dipropylene glycol, niacinamide, EDTA-2Na, and ethanol. The checkerboard assay was conducted to confirm the antibacterial synergy of these seven substances and the three skin conditioning agents. Consequently, ethanol and EDTA-2Na were detected as the significant materials with synergistic effect as well as ethanol showed antibacterial synergy with all the three compounds. When seven of selected materials were mixed with glyceryl caprylate, there were synergistic or additive activity against S. aureus, gram-positive bacteria and it was suggested that the combination with 1,2-hexanediol and glyceryl caprylate was useful to control both gram-positive and gram-negative bacteria when there were four kinds of polyols. This study is meaningful in that it confirmed the antibacterial synergy of the skin conditioning agents with antimicrobial activity and the main raw materials frequently used in cosmetics, thereby contributing to prediction of the antibacterial activity of the skin conditioning agents in cosmetic formulations.

• Journal of the Society of Cosmetic Scientists of Korea
• /
• v.26 no.1
• /
• pp.81-92
• /
• 2000

Development of stabilized enzyme was attempted for cosmetic applications. Papain, a proteolytic enzyme, was stabilized through conjugation with a soluble carbohydrate biopolymer, SC-glucan$^{TM}$ . With a novel structure of the conjugation site, stability of the enzyme was significantly enhanced such that more than 90% of the initial activity retained after a month storage at 45$^{\circ}C$, while no activity were detected in native enzyme or enzyme simply mixed with SC-glucan$^{TM}$ after the storage. Conjugation with SC-glucan$^{TM}$ not only extended the half-life of the enzyme on storage at higher temperature, but was also found to protect enzymes against some components contained in cosmetic products for skin care. Cosmetic lotion containing 1 % papain conjugate was more effective and less irritative in exfoliating stratum corneum of human skin than the lotion containing 5% lactic acid, one of the current popular exfoliating agents.gents.

• Korean Chemical Engineering Research
• /
• v.62 no.2
• /
• pp.142-146
• /
• 2024

There is growing interest in natural cosmetic ingredients as natural cosmetics become popular. As a part of effort to look for natureal cosmetic agent, seaweed Sargassums were tested for functional cosmetic agents. Effective materials were extracted from Sargassum coreanum. Sargassum hemiphyllum, and Sargassum patens by simple hot water extraction. Antioxidation, whitening, anti-wrinkle, UV absorption and anti-inflammation effects were studied for functional cosmetic agents. Sargassum extracts indicated excellent cell viability, strong anti-oxidation effect by DPPH radical scavenging activity and showed significant whitening effect from tyrosinase inhibition. However, effects of antiwrinkle, UV absorption and anti-inflammation were negligible. In conclusion, Sargassum coreanum extracts showed good possibility for anti-oxidation and whitening cosmetic agent.