Efficacy evaluation of oil control cosmetics

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According to the new regulations, the efficacy claims of oil controlled cosmetics must pass the cosmetic efficacy claims evaluation test. In human efficacy evaluation tests, consumer use tests, and laboratory tests, one item can be selected for testing, and the authenticity of its efficacy can be explained together with literature or research data
The main methods for detecting the efficacy of oil control cosmetics include sebum measurement and skin brightness.

Measurement of sebum:
Use a sebum sensor probe to measure epidermal sebum: The rate of sebum secretion (ug/h) is calculated based on the amount of sebum secreted to the skin surface within 1 hour as a standard, which is used to verify the effectiveness of oil control products.

Skin brightness:
Measure specular reflection light, which means that the beam of light is reflected back at the same angle as its contact with the measuring surface.

Cosmetics detection method
The higher the brightness of the skin, the more complete the stratum corneum barrier, the better the moisture content and oil-water balance in the skin.

Refer to T/ZHCA 002-2018 for the test method of cosmetics oil control efficacy, which is applicable to the test of oil control efficacy of skin care cosmetics such as skin cream, skin care lotion, lotion, skin care gel, etc The principle of this cosmetic oil control efficacy testing method is to measure the transparency of the oil absorption tape after absorbing sebum, and measure the amount of sebum on the skin surface
The testing conditions should meet the following standards:
l The testing environment temperature should be 20C~22C, and the relative humidity should be 40%~60%, and real-time dynamic monitoring should be carried out The testing conditions during the testing process should be consistent, such as the tester, location, instrument, etc
The subjects need to ensure that the number of valid cases is not less than 30, and the age range is 18-45 years old
Cosmetic oil control efficacy testing process:
Descriptive statistics are conducted on the measurement values of the sample application area and the control area, including quantity mean, standard deviation, minimum, median, and maximum values.
Calculate the difference between the initial values of the sample application area and the control area and the measured values at other measurement time points, and then use this difference to statistically analyze the differences between the sample application area and the control area at different measurement time points. If the test data is a normal distribution, use t-test method for statistical analysis; If the test data is non normal distribution, the rank sum test method is used for statistical analysis
The statistical methods all use double tailed tests, with a test level of a=0.05
Result of oil control efficacy test for makeup products:
Positive result: Compared with the control area, there is a significant difference in the difference in sebum measurement values in the sample application area, indicating that the tested sample has oil control efficacy.

Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms
3. Used as a sales report: issuing legally effective testing reports to make consumers more confident
4. Papers and research: Provide professional personalized testing needs
5. Judicial services: providing scientific, fair, and accurate testing data
6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations
3. Mail samples and arrange testing
4. Progress tracking and result feedback
5. Provide reports and after-sales service
6. If urgent or priority processing is required

Testing and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
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4. Free initial testing, with no testing fees charged
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7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc
8. The testing report is authoritative and effective, and is generally used in China