CN103616309A - Method for testing humidity of cosmetics - Google Patents
Method for testing humidity of cosmetics Download PDFInfo
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- CN103616309A CN103616309A CN201310624195.2A CN201310624195A CN103616309A CN 103616309 A CN103616309 A CN 103616309A CN 201310624195 A CN201310624195 A CN 201310624195A CN 103616309 A CN103616309 A CN 103616309A
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- cosmetics
- filter paper
- magnesium chloride
- aqueous solution
- saturated aqueous
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Abstract
The invention relates to a method for testing the humidity of cosmetics. According to the method, by using the difference of influences of a magnesium chloride saturated water solution and a glucose saturated water solution to air humidity to cause stable humidity difference at two sides of filter paper coated with a cosmetics sample to be tested, the moisture preserving effect of the cosmetics sample to be tested is measured, and the moisture preserving function of cosmetics can be objectively measured. The method is convenient and simple, and low in cost, and can perform multiple tests at one time, thereby remarkably improving testing efficiency and accuracy rate.
Description
Technical field
The present invention relates to the evaluation of cosmetic industry, be specifically related to a kind of method of testing of moisturizing degree of cosmetics.
Background technology
Moisture in keratoderma, to maintaining the soft and moist and elasticity of skin, maintains skin metabolism normally, prevents that skin aging from all having great importance with the generation of wrinkle.Healthy its cuticular water cut of skin should and between 10%～30%, if moisture content of skin lower than
LO%, skin will be dried, coarse, likely chaps.Just playing under reason condition, due to cuticular water sorption and barrier function, adding the lipid of sweat gland and smegma
Matter covering effect, makes the moisture in keratoderma be difficult for running off, but dry at very cold,
During low the and normal barrier function damage of skin of ambient humidity, easily cause skin lack of water, and then cause that the multiple changes such as dry, coarse occur skin.
NMF is accounting for extremely important position in cosmetic material, and reason has two, one, the quality of cosmetics depends on NMF, its two, one of basic substance that forms cosmetics is also NMF.NMF, by keeping the moisture content of skin, promotes the absorption of moisture, the effect to skin generation moisturizing and water retention.Past, people often thought, can take following two kinds of methods to prevent skin lack of water, first; can use at skin surface the water conservation material of good water solubility, wetting cuticula, second; use liposoluble substance, at skin surface, form layer protecting film, prevent the loss of keratoderma moisture content.Filled suitable moisture content to skin, now through a large amount of research, show, xerodermatic true cause is cuticula lack of water, therefore, if be only coated with liposoluble substance at skin surface, cannot carry out moisturizing to cuticula.
In recent years, in order to meet the moistening effect of cosmetics, about the correlative study of NMF and moisture-keeping cosmetics, also day by day receive insider's attention and concern.Have scholar to think, desirable NMF should possess following character: first, should have continuation and appropriate moisture absorption, and moisture absorption is not subject to the impact of environment temperature, humidity etc.; The second, volatility and solidifying point are more low better, have moderate viscosity, and stronger skin affinity is good with other composition compossibilities; The 3rd, should colourless as far as possible, tasteless, odorless, safe.At present conventional NMF has multiplely, comprises that people's most study is also that what to be most widely used is polyvalent alcohol simultaneously, secondly also comprises betaine, pyrrolidone sodium carboxylate (PCA-Na), mucopolysaccharide one glass aldehydic acid sodium etc.How the moisture-keeping efficacy of cosmetics is carried out to science sign, significant for the research and development of cosmetics.At present, evaluation method for cosmetics moisture-keeping efficacy comprises near infrared light method, capacitance method, differential scanning calorimetry (DSC), but these methods all need that instrument is had to higher requirement, and also operating process is loaded down with trivial details, and just as a kind of method of testing, propose, there is no reference data accurately, therefore, be not suitable for cosmetics to carry out the evaluation of moisture-keeping efficacy yet.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of method of testing of moisturizing degree of cosmetics is provided.
Technical scheme of the present invention is as follows:
A method of testing for the moisturizing degree of cosmetics, the method comprises the following steps:
(1) in two beakers, add respectively magnesium chloride and water to be mixed with magnesium chloride saturated aqueous solution, in another beaker, add glucose and water to be mixed with glucose saturated aqueous solution;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, constant temperature was placed after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
Preferably, the preparation method of the saturated magnesium chloride brine described in step (1) is: take magnesium chloride 2-10g and be dissolved in 30-100ml deionized water, stir and evenly mix, make saturated magnesium chloride brine.
Preferably, the preparation method of the saturated D/W described in step (1) is: take 5-30g glucose and be dissolved in 20-200ml deionized water, stir and evenly mix, make saturated D/W.
The addition of the glucose saturated aqueous solution preferably, adding in described step (3) is 20 ~ 200ml.
Preferably, the addition that fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution in described step (3) is 20% ~ 30% of beaker overall height.
Preferably, the shape of described filter paper is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely.
Preferably, the critical relative moisture (CRH) of described magnesium chloride saturated aqueous solution is 23-33%.
Preferably, the critical relative moisture (CRH) of described glucose saturated aqueous solution is 75-90%.
Preferably, in described step (3), the temperature range of the constant temperature of drying box is 10 ~ 40 ℃.
Preferably, when testing, can put into many groups cosmetic sample to be measured simultaneously, test simultaneously, test result is averaged.
Compared to the prior art, beneficial effect of the present invention is as follows:
1. less demanding to experimental apparatus, equipment and testing staff in the present invention, and mainly detect reagent magnesium chloride and glucose wide material sources, cost is low, can obviously reduce testing cost, has higher practical value.
2. the present invention utilizes magnesium chloride saturated aqueous solution different on the impact of air humidity with glucose saturated aqueous solution itself, and in the both sides that scribble the filter paper of cosmetic sample to be measured, cause stable psychrometric difference, and then measure the moistening effect of cosmetic sample to be measured, insulation effect that can objective measurement cosmetics, and method of testing is convenient and simple, with low cost, many group tests be can once carry out, thereby testing efficiency and accuracy rate significantly improved.
4. the blank filter paper do not scribble cosmetic sample to be measured is set in test process of the present invention and tests under the same conditions water-intake rate, and the water suction factor of blank filter paper is got rid of, make test result more can react the moistening effect of cosmetic sample to be measured itself.When measuring, can adopt three groups of parallel experiments at every turn, guaranteed accuracy and the representativeness of measurement result.
Embodiment
The present invention, by the present invention of following specific embodiment more detailed description, can make those skilled in the art more fully understand the present invention, but not limit the present invention in any way.
Embodiment 1
A method of testing for the moisturizing degree of cosmetics, the method comprises the following steps:
(1) take magnesium chloride 6g and be dissolved in 80ml deionized water, stir and evenly mix, make saturated magnesium chloride brine;
Take 15g glucose and be dissolved in 100ml deionized water, stir and evenly mix, make saturated D/W;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in 100ml step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, 30 ℃ of placements of constant temperature are after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
The addition that wherein fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution is 25% of beaker overall height; The shape of the filter paper of stating is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely;
The critical relative moisture of magnesium chloride saturated aqueous solution (CRH) is 28%; The critical relative moisture (CRH) of described glucose saturated aqueous solution is 80%;
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
Cosmetic sample to be measured is certain commercially available cosmetics, and the moisturizing rate recording is 7.2%.
?
Embodiment 2
A method of testing for the moisturizing degree of cosmetics, the method comprises the following steps:
(1) take magnesium chloride 10g and be dissolved in 100ml deionized water, stir and evenly mix, make saturated magnesium chloride brine;
Take 30g glucose and be dissolved in 200ml deionized water, stir and evenly mix, make saturated D/W;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in 200ml step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, 40 ℃ of placements of constant temperature are after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
The addition that wherein fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution is 30% of beaker overall height; The shape of the filter paper of stating is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely.
The critical relative moisture of magnesium chloride saturated aqueous solution (CRH) is 33%; The critical relative moisture (CRH) of described glucose saturated aqueous solution is 90%.
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
When test, in step (3), put into 3 groups of cosmetic samples to be measured simultaneously, test test result simultaneously and be respectively 8.8%.8.5%, 8.5%, averaging is 8.6%
Cosmetic sample to be measured is certain commercially available cosmetics, and the moisturizing rate recording is 8.2%.
Embodiment 3
A method of testing for the moisturizing degree of cosmetics, the method comprises the following steps:
(1) take magnesium chloride 2g and be dissolved in 30ml deionized water, stir and evenly mix, make saturated magnesium chloride brine;
Take 5g glucose and be dissolved in 20ml deionized water, stir and evenly mix, make saturated D/W;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in 20ml step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, 10 ℃ of placements of constant temperature are after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
The addition that wherein fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution is 20% of beaker overall height; The shape of the filter paper of stating is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely;
The critical relative moisture of magnesium chloride saturated aqueous solution (CRH) is 23%; The critical relative moisture (CRH) of described glucose saturated aqueous solution is 75%;
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
Cosmetic sample to be measured is glycerine, and the moisturizing rate recording is 4.5%.
Embodiment 4
A method of testing for the moisturizing degree of cosmetics, the method comprises the following steps:
(1) take magnesium chloride 8g and be dissolved in 90ml deionized water, stir and evenly mix, make saturated magnesium chloride brine;
Take 18g glucose and be dissolved in 120ml deionized water, stir and evenly mix, make saturated D/W;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in 120ml step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, 20 ℃ of placements of constant temperature are after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
The addition that wherein fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution is 25% of beaker overall height; The shape of the filter paper of stating is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely;
The critical relative moisture of magnesium chloride saturated aqueous solution (CRH) is 30%; The critical relative moisture (CRH) of described glucose saturated aqueous solution is 85%;
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
Cosmetic sample to be measured is certain commercially available cosmetics, and the moisturizing rate recording is 6.6%.
The above embodiment is preferred embodiments of the present invention, is not to limit the scope of the present invention, and the equivalence of doing according to structure, feature and principle described in the present patent application the scope of the claims therefore all changes or modifies, and all should comprise in patent claim of the present invention.
Claims (10)
1. a method of testing for the moisturizing degree of cosmetics, is characterized in that, the method comprises the following steps:
(1) in two beakers, add respectively magnesium chloride and water to be mixed with magnesium chloride saturated aqueous solution, in another beaker, add glucose and water to be mixed with glucose saturated aqueous solution;
(2) get a dry filter paper and put into drying box and remove moisture, weigh and obtain filter paper weight M1 and cosmetics to be measured are evenly spread upon to a side of filter paper, obtain scribbling the filter paper of cosmetics to be measured, then weigh and obtain weight M2;
(3) in a drying box, pour the glucose saturated aqueous solution making in step (1) into, airtight, make the moisture stable in drying box, then by a side direction that scribbles cosmetics to be measured of the filter paper that scribbles cosmetics to be measured obtaining in step (2), cover on the beaker that fills magnesium chloride saturated aqueous solution making in step (1), the dry filter paper that is simultaneously m1 by an initial weight covers on the beaker that another part fill magnesium chloride saturated aqueous solution, two beakers are put on the support of drying box, constant temperature was placed after 24 hours, weigh, obtain scribbling the weight M3 of filter paper and the weight m2 of blank filter paper of cosmetics to be measured,
(4) the moisturizing rate of cosmetics to be measured is [M3-M1-M1 * (m2-m1) ÷ m2] ÷ (M2-M1) * 100%.
2. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, it is characterized in that, the preparation method of the saturated magnesium chloride brine described in step (1) is: take magnesium chloride 2-10g and be dissolved in 30-100ml deionized water, stir and evenly mix, make saturated magnesium chloride brine.
3. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, it is characterized in that, the preparation method of the saturated D/W described in step (1) is: take 5-30g glucose and be dissolved in 20-200ml deionized water, stir and evenly mix, make saturated D/W.
4. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, the addition of the glucose saturated aqueous solution adding in described step (3) is 20 ~ 200ml.
5. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, the addition that fills magnesium chloride saturated aqueous solution in the beaker of magnesium chloride saturated aqueous solution in described step (3) is 20% ~ 30% of beaker overall height.
6. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, the shape of described filter paper is consistent with the shape of beaker mouth, and the profile of filter paper can just cover beaker mouth completely.
7. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, the critical relative moisture (CRH) of described magnesium chloride saturated aqueous solution is 23-33%.
8. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, the critical relative moisture (CRH) of described glucose saturated aqueous solution is 75-90%.
9. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, in described step (3), the temperature range of the constant temperature of drying box is 10 ~ 40 ℃.
10. the method for testing of the moisturizing degree of a kind of cosmetics according to claim 1, is characterized in that, when testing, can put into many groups cosmetic sample to be measured simultaneously, tests simultaneously, and test result is averaged.
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| CN201310624195.2A CN103616309A (en) | 2013-11-29 | 2013-11-29 | Method for testing humidity of cosmetics |
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| CN201310624195.2A CN103616309A (en) | 2013-11-29 | 2013-11-29 | Method for testing humidity of cosmetics |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107690577A (en) * | 2015-06-05 | 2018-02-13 | 荷兰联合利华有限公司 | Method of testing for the specific composition in antiperspirant and wetting agent cosmetic composition |
| CN112557256A (en) * | 2020-12-23 | 2021-03-26 | 青岛大学 | Method for testing moisture retention of solution |
| CN115326506A (en) * | 2022-08-09 | 2022-11-11 | 广州莱德璞检测技术有限公司 | Multifunctional cosmetic waterproof performance detection system and method |
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| CN102252933A (en) * | 2011-06-27 | 2011-11-23 | 大连工业大学 | Method for measuring moisture absorption performance of wallpaper |
| CN202335437U (en) * | 2011-10-23 | 2012-07-18 | 温州市质量技术监督检测院 | Moisture absorption and moisture permeability testing instrument for finished shoes |
| CN102749260A (en) * | 2012-03-22 | 2012-10-24 | 中国科学院大气物理研究所 | Method and apparatus for determining water content and moisture absorption mass increase rate of atmospheric particles |
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2013
- 2013-11-29 CN CN201310624195.2A patent/CN103616309A/en active Pending
Patent Citations (5)
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|---|---|---|---|---|
| CN1821784A (en) * | 2005-05-09 | 2006-08-23 | 上海中策工贸有限公司 | Cosmetics quality detector |
| CN102252933A (en) * | 2011-06-27 | 2011-11-23 | 大连工业大学 | Method for measuring moisture absorption performance of wallpaper |
| CN102252934A (en) * | 2011-07-12 | 2011-11-23 | 北京服装学院 | Device and method for testing dynamic moisture absorption data of fabric |
| CN202335437U (en) * | 2011-10-23 | 2012-07-18 | 温州市质量技术监督检测院 | Moisture absorption and moisture permeability testing instrument for finished shoes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107690577A (en) * | 2015-06-05 | 2018-02-13 | 荷兰联合利华有限公司 | Method of testing for the specific composition in antiperspirant and wetting agent cosmetic composition |
| CN112557256A (en) * | 2020-12-23 | 2021-03-26 | 青岛大学 | Method for testing moisture retention of solution |
| CN115326506A (en) * | 2022-08-09 | 2022-11-11 | 广州莱德璞检测技术有限公司 | Multifunctional cosmetic waterproof performance detection system and method |
| CN115326506B (en) * | 2022-08-09 | 2023-04-18 | 广州莱德璞检测技术有限公司 | Multifunctional cosmetic waterproof performance detection system and method |
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Application publication date: 20140305 |