• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.197-198
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• 2008

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

• Proceedings of the Korean Society of Applied Pharmacology
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• 2007.11a
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• pp.117-126
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• 2007

Cosmetics have mild activity on the human body, and intended to be used for cleaning, beautifying the human body, and also keeping healthy skin or hair, promoting attractiveness or altering the appearance. Functional cosmetics, in other words cosmeceuticals, are restricted for following functions: 1) Whiten the skin tone by preventing deposition of melanin pigmentation or lightening of the color of melanin of skin, 2) alleviate or improve wrinkles of the skin, and 3) protect the skin from the ultra violet rays from the sun. According to the functions of the functional cosmetics, skin whitening products, anti-wrinkle products, and suntan & sunscreen products are manufactured. In order to manufacture and import the functional cosmetics in Korea, the approval process in KFDA is necessary. The review process in KFDA is performed based on The Korea Food and Drug Administration Notification 2007-44, "The Regulation of Reviewing the Functional Cosmetics" (June 29, 2007). Only after the approval of KFDA, functional cosmetics are allowed to advertise to the consumers for their functionality.

• Journal of the Korean Medical Association
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• v.61 no.11
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• pp.644-648
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• 2018

The incidence of skin cancer has continuously increased in Korea, probably due to sun exposure and increases in the aging population. Ultraviolet light, a well-known risk factor for skin cancer, can cause DNA damage, mutation, and immune suppression, followed by abnormal proliferation. To prevent photocarcinogenesis, the appropriate use of sunscreen should be emphasized. Using broad-spectrum sunscreens with sun protection factor values of 15 or higher and frequent reapplication are recommended. Controversy exists about whether vitamin D synthesis is inhibited by the use of sunscreen. However, considering that skin cancer most commonly develops on the head and neck area, applying it to the face and neck is reasonable in terms of balancing the risk-benefit ratio.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.404.2-404.2
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• 2002

The present study was undertaken to develop the in vitro sun protection factor(SPF) test method having good correlation with in vivo method using human. 8% homomentyl salicylate. P3 reference standard and commercially available sunscreen products were measured by the in vitro method using SPF 290S analyzer. and the SPFs were compared with the SPFs measured by in vivo test method. In vitro SPFs of 8% HMS and P3 reference standard were 4.59$\pm$0.12 and 14.94$\pm$0.83. (omitted)

• Journal of Practical Agriculture & Fisheries Research
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• v.7 no.1
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• pp.133-154
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• 2005

• Journal of the Society of Cosmetic Scientists of Korea
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• v.23 no.3
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• pp.134-146
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• 1997

Consumers have recently preferred to purchase extensive UV intercepting products, which are waterproof and free from side effects on skin. Testing Cytoroxicity in SR method, cell survivial ratio of UV-B interceptors decreased above 0.08W/V%, and so did that of UV-A interceptors above 0.06W/V%. Also, Patch-test of inorganic UV interceptors resulted in no skin irritation even below 10.0 and 11.25. UV interceptors in the sunlight showed yellowish discoloration in 5 to 14 days. In absorption curves, UV-B was most suitable for Octyl methoxycinnamate and UV-A for Butyl methoxy dibenzoylmethane. Fro this reason, Nylonpoly UVA/UVB the material of OMC and BMDM coated with Nylon & polyethylene, was used as the organic UV interceptor. And zinc oxide and titanium dioxide was used as inorganic UV ibterceptors. The appropriate mixture ratio of ZnO and TiO2 was 6 to 4.6% of ZnO, 4% of TiO2 and 5% of Nylonpoly UVA/UVB were all combined with our sunscreen cream. The SPF value of in-vivo applied to a guinea pig was 34.9 and that of in-vivo was 38.5. Cyclomerhicone and dimerthicone were used in water-in-Silicone system. Ceryl diverhicone and sorbitan sesquioleate were used as emulsifiers and MgSO4, 7H2O, Mg-stearate/Mg-Al-stearate copolymer as emulsification stabilizers. In practical application, each SPF duration of O/W type and W/S type containing sunscreen cream of the same content showed that W/S type of sunscreen cream was 5 times as durable as the other. This product is fit for using in swimming, climbing or skiing. This research is to minimize skin trouble used by UV interceptors and to make one with proper softness, skin safety and UV intercepting efficiency.

• Journal of Pharmaceutical Investigation
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• v.35 no.6
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• pp.411-416
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• 2005

The aim of the present work was to prepare the nanosuspension of inorganic pigment which shows light reflection and scattering as efficient sunscreen. The zinc oxide (ZnO) was chosen as an inorganic pigment, and high pressure homogenizer and bead mill have been used for the preparation of nanosuspension. The ZnO nanosuspensions were characterized by particle size, in vitro sun protection factor (SPF) and UV transmittance. ZnO nanosuspension prepared by bead mill showed the average diameter of $119{\pm}4\;nm$, resulting in the high value of SPF $(28.74{\pm}2.06,\;n=20)$, while that prepared by high pressure homogenizer showed the average diameter of $751{\pm}32\;nm$ with the relative lower value of SPF $(21.38{\pm}1.94\;n=20)$. In addition, the film of ZnO nanosuspension prepared by bead mill was showed a high visible ray (VIS) transmittance, indicating a high transparency. In conclusion, a physically stable ZnO nanosuspension in cyclomethicone was successfully prepared using bead mill for the suitable sunscreen preparations.

• Journal of the Korean Applied Science and Technology
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• v.35 no.3
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• pp.985-1001
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• 2018

In this study, we tried the various experiments using the emulsifier, electrolyte, stabilizer and gelling agent in order to improve a stability of low viscosity W/O emulsion. As a result, when we used polyglyceryl-4 diisostearate/polyhydroxystearate/sebacate as a main emulsifier, PEG-30 dipolyhydroxystearate and cetyl PEG/PPG-10/1 dimethicone as a co-emulsifier for stable emulsification system, 0.5 % sodium chloride as an electrolyte, 1 % distearyldimonium chloride as a stabilizer, 0.5 % glyceryl behenate/eicosadioate as an oil gelling agent, emulsion particle is the best. Also, we got the stable and low viscosity W/O emulsion maintained at a constant viscosity at 2,000 cps or less. In addition, we were able to examine the possibility of development of low viscosity fluids type sunscreens with excellent feeling and stability through the application of inorganic sunscreen agents.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.47 no.3
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• pp.193-203
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• 2021

Sunscreen is a product that blocks and scatters UV rays to protect them from UV rays. Domestic consumers generously invest in sunscreen, ranking first in the world in terms of sun care consumption per capita in 2019. Sunscreens are subject to a variety of factors, including regulations, ingredients, formulations, clinical trials, and product labeling, but are tightly controlled as product demand increases. In this study, various factors affecting the UV protection factor were investigated and analyzed. Preemptive measures such as continuous investigation are required so that various factors such as these do not become obstacles for domestic cosmetics companies to export, and to revitalize the export market with international competitiveness.