• Journal of the Society of Cosmetic Scientists of Korea
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• v.38 no.3
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• pp.197-200
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• 2012

To develop lipstick products with superior moisturizing effect using moisture base, bound water capacity and water holding capacity were investigated by DSC. Bound water capacity of the lipstick sample excluding moisture base is found to be 5.12 %. DSC measurement showed that bound water capacity and the concentration of moisture base were positively correlated. Additionally, DSC measurements and in vitro effective water holding capacity measurement showed similar patterns. Therefore, measuring of bound water capacity by DSC can predict the moisturizing effect of lipstick products.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.23 no.3
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• pp.128-133
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• 1997

In manufacturing emulsion lipstick in the past, heat and emulsifyoil phase made with oil, wax and lipophilic emulsifier with water phase together; and then mold above-mentioned materials, so-called lipophilic emulsified lipstick production method has been used. However it is hard to manufacture products using the above said method and furthermore, weak in moisturizing effect, lip care and stability. In this paper, I will discuss about multi-emulsion lipstick complementing already existing emulsion lipstick in terms of stability, giving moisturing effect of lip, and outstanding protection effectiveness of skin by safely gelatinating the state between amphiphilic lipid and water in stable.

• Proceedings of the SCSK Conference
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• 2003.09b
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• pp.149-162
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• 2003

Moisturizing the skin is one of the most important functions of skincare cosmetics, because water plays a significant role in keeping the skin healthy. There are various humectants including polyol (glycerin and 1,3-butylene glycol), water-soluble polymers, and botanical extracts. It is well known that the increased amount of polyol in lotion for obtaining high moisturizing effect gives a sticky feeling to the skin. Therefore, a few humectants that can give high moisturizing effect without a sticky feeling for lotion formula is available. On the other hand, oil-based lipstick is well known to have a difficulty to contain a large amount of hydrophilic humectants, because the humectants is unable to be mixed well into oil-based lipsticks and give the lips a peculiar taste. There are newly developed humectants, polyoxyethylene/polyoxypropylene dimethyl ether (EPDME) that can solve these problems describable above. EPDME is a random copolymer of ethylene oxide and propylene oxide. EPDME gives a low sticky feeling with a high moisturizing effect when it is used in lotion. As a remarkable character, EPDME can show not only a preventing effect on rough and dry skin, but also a improving effect upon the use for 1-4 weeks. EPDME can show a synergistic effect with glycerin on preventing to rough and dry skin. Since EPDME can be dissolved in oil-based formulation and used as an ingredient of lipsticks, EPDME can give a moisturizing effect that allows lip to be healthy condition. EPDME can also give no peculiar taste even upon the use of a large amount. EPDME is a useful cosmetic ingredient that can show a good skin care effect in both water-based formula and oil-based formula. EPDME of which polarity can be controllable is expected to be used for various cosmetic applications in near future.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.39 no.1
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• pp.65-73
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• 2013

Lip make-up products can be easily taken into body with food. For this reason, those products are requires to meet lots of qualifications compared with other cosmetic products. In addition, concerns about safety on synthesized tar pigments is constantly issued. Thus, demand of natural pigments is gradually increased and many kinds of natural pigments have been developed. However, there are some problems when natural pigments are applied to cometic products instead of synthetic ones. There is a reason that most of natural pigments consist of hydrophilic materials of sort of anthocyanin, but the existing lip make-up products is anhydrous oil dispersion type without water consisting oil and wax. Therefore, when watersoluble natural pigments are applied to anhydrous lip make-up products, color expression is lower and phase separation occurs due to the instability of the product. In addition, natural pigments have disadvantages that they can easily change by pH, heat and sunlight. There are troubles of stability because it is not easy to adjust for these factors in case of anhydrous forms. Aim of study is to develop lip make-up products which have not only safe to human but being high in expression of color by using natural pigments and securing stability of colorant as natural pigments are offered to polyol in oil emulsion. Then, lip make-up products which have heavy moisture while having not dryness that is created when the moisture evaporates are developed.

• Journal of the Korean Applied Science and Technology
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• v.34 no.4
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• pp.727-736
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• 2017

In this study, the method of evaluation of moisturizing ability of cosmetics using specimens was studied as an alternative method of clinical tests. Cosmetic spreadability, surface drying, and moisture loss rate of four specimens (Japanese cake (Maru mochi), Garaetteok, wheat flour, and agar) were evaluated. Also, the water loss rate of the specimens and the transepidermal waterloss were analyzed for 10 kinds of lip make-up products (5 kinds of lipstick, 3 kinds of lip balm, 2 kinds of lip gloss). The moisture loss rate (moisture evaporation sensitivity) of the agar specimen was highest in the order of agar> Garaetteok> Japanese cake> wheat flour. Agar specimens are the most suitable in terms of spreadability, surface crack, and raw material supply. Containers for the preparation of agar specimens are suitable for plastic materials with low heat transfer, which can produce convex, smooth surface specimens. In the evaluation of moisturizing ability of lip makeup products, there was a strong correlation between the water loss rate and the transepidermal waterloss rate measured with agar specimens. These results show that the proposed method can be used as one of the useful alternative test methods.