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QB/T 4256-2011 PDF English

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QB/T 4256-2011: Guideline for evaluation of cosmetics moisturization efficacy
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QB/T 4256-2011: Guideline for evaluation of cosmetics moisturization efficacy

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LIGHT INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.100.70 Classification No.. Y42 Filing No.. 34974-2012 Guideline for evaluation of cosmetics moisturization efficacy Issued on. DECEMBER 20, 2011 Implemented on. JULY 01, 2012 Issued by. Ministry of Industry and Information Technology of PRC

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Basic principles... 4 4 Principles... 5 5 Test conditions and volunteer requirements... 5 6 Reagents and materials... 5 7 Instruments... 6 8 Measurement steps... 6 9 Result calculation... 7 10 Result judgment... 7 11 Test report... 7

Foreword

This standard was proposed by China National Light Industry Federation. This standard shall be under the jurisdiction of the National Standardization Technical Committee of Flavor, Flavor and Cosmetics (SAC/TC 257). The main drafting organizations of this standard. Beijing Technology and Business University, China Academy of Inspection and Quarantine, Chinese People's Liberation Army Air Force General Hospital, Shanghai Jahwa United Co., Ltd., L'Oreal (China) Co., Ltd., Unilever (China) Co., Ltd., Amway (China) Daily Necessities Co., Ltd., Shanghai Daily Chemical Industry Research. The main drafters of this standard. Su Ning, Wang Changtao, Dong Yinmao, Liu Juan, Wang Chao, Zhao Hua, Liu Wei. Guideline for evaluation of cosmetics moisturization efficacy

1 Scope

This standard specifies a method for evaluating the moisturization efficacy of cosmetics - Capacitance method to determine the moisture content of the stratum corneum of the skin. This standard is applicable to the determination of moisturization efficacy of skin care creams, lotions, cosmetic products. Other types of cosmetics, which are claimed having moisturization efficacy, can refer to this standard for evaluation.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. Hygienic specifications for cosmetics

3 Basic principles

3.1 Cosmetics to be tested shall be products that have passed the physical, chemical, hygienic tests. Before the human test, it shall complete the necessary toxicological tests, in accordance with the "Hygienic specifications for cosmetics", AND issue a written certificate. The sample, which fails in the toxicological tests, will not be subject to the human test. 3.3 The guidelines for the evaluation of moisturization efficacy of cosmetics are applicable to the measurement of products before and after use.

4 Principles

Using the capacitance method to measure the moisture content of the human skin's stratum corneum, is based on the principle that, the dielectric constants of water and other substances are significantly different.

5 Test conditions and volunteer requirements

5.1 Environmental conditions for test Test environment's temperature. 20 °C ~ 22 °C; humidity. 40% ~ 60%; perform real- time dynamic monitoring. 5.2 Number of volunteers Effective volunteers 24 ~ 30 people. 5.3 Volunteer conditions 5.3.1 Age between 18 ~ 65 years old (except pregnant or lactating women). 5.3.4 Those who have no active allergic diseases. 5.3.5 Those who have no serious allergic constitution. 5.3.6 Those who have not taken hormone drugs and immunosuppressants, in the past one month. 5.3.7 Those who have not participated in other clinical tests, at the test site at present or in the last three months.

6 Reagents and materials

6.1 Dry face tissue. 6.3 Syringes or pipettes.

7 Instruments

7.1 Capacitance method skin moisture meter, such as Corneometer or equivalent.

8 Measurement steps

8.1 Preparation before the test It shall not use any products (cosmetics or external medicines), at the test site, 2 ~ 3 days before the test; it shall not be in contact with water, for 1 ~ 3 hours. Before the test, subjects need to clean their hands and forearms uniformly. The cleaning method is to wipe it clean, by dry facial tissue. 8.2 Determination The product's coating area and blank control area shall be randomly distributed, around the left and right arm's marking area, to ensure that the locations of all products and blank areas are statistically balanced.

9 Result calculation

Descriptive statistics are performed on the measured values of each test area, including quantity, mean, standard deviation, minimum, median, maximum values, etc.

10 Result judgment

Positive result. Before and after the use of the product, if there is a significant difference in the moisture content of the stratum corneum in the test area, it indicates that the test sample has a moisturization efficacy.

11 Test report

The test report shall include. QB/T 4256-2011 LIGHT INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.100.70 Classification No.. Y42 Filing No.. 34974-2012 Guideline for evaluation of cosmetics moisturization efficacy Issued on. DECEMBER 20, 2011 Implemented on. JULY 01, 2012 Issued by. Ministry of Industry and Information Technology of PRC

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Basic principles... 4 4 Principles... 5 5 Test conditions and volunteer requirements... 5 6 Reagents and materials... 5 7 Instruments... 6 8 Measurement steps... 6 9 Result calculation... 7 10 Result judgment... 7 11 Test report... 7

Foreword

This standard was proposed by China National Light Industry Federation. This standard shall be under the jurisdiction of the National Standardization Technical Committee of Flavor, Flavor and Cosmetics (SAC/TC 257). The main drafting organizations of this standard. Beijing Technology and Business University, China Academy of Inspection and Quarantine, Chinese People's Liberation Army Air Force General Hospital, Shanghai Jahwa United Co., Ltd., L'Oreal (China) Co., Ltd., Unilever (China) Co., Ltd., Amway (China) Daily Necessities Co., Ltd., Shanghai Daily Chemical Industry Research. The main drafters of this standard. Su Ning, Wang Changtao, Dong Yinmao, Liu Juan, Wang Chao, Zhao Hua, Liu Wei. Guideline for evaluation of cosmetics moisturization efficacy

1 Scope

This standard specifies a method for evaluating the moisturization efficacy of cosmetics - Capacitance method to determine the moisture content of the stratum corneum of the skin. This standard is applicable to the determination of moisturization efficacy of skin care creams, lotions, cosmetic products. Other types of cosmetics, which are claimed having moisturization efficacy, can refer to this standard for evaluation.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. Hygienic specifications for cosmetics

3 Basic principles

3.1 Cosmetics to be tested shall be products that have passed the physical, chemical, hygienic tests. Before the human test, it shall complete the necessary toxicological tests, in accordance with the "Hygienic specifications for cosmetics", AND issue a written certificate. The sample, which fails in the toxicological tests, will not be subject to the human test. 3.3 The guidelines for the evaluation of moisturization efficacy of cosmetics are applicable to the measurement of products before and after use.

4 Principles

Using the capacitance method to measure the moisture content of the human skin's stratum corneum, is based on the principle that, the dielectric constants of water and other substances are significantly different.

5 Test conditions and volunteer requirements

5.1 Environmental conditions for test Test environment's temperature. 20 °C ~ 22 °C; humidity. 40% ~ 60%; perform real- time dynamic monitoring. 5.2 Number of volunteers Effective volunteers 24 ~ 30 people. 5.3 Volunteer conditions 5.3.1 Age between 18 ~ 65 years old (except pregnant or lactating women). 5.3.4 Those who have no active allergic diseases. 5.3.5 Those who have no serious allergic constitution. 5.3.6 Those who have not taken hormone drugs and immunosuppressants, in the past one month. 5.3.7 Those who have not participated in other clinical tests, at the test site at present or in the last three months.

6 Reagents and materials

6.1 Dry face tissue. 6.3 Syringes or pipettes.

7 Instruments

7.1 Capacitance method skin moisture meter, such as Corneometer or equivalent.

8 Measurement steps

8.1 Preparation before the test It shall not use any products (cosmetics or external medicines), at the test site, 2 ~ 3 days before the test; it shall not be in contact with water, for 1 ~ 3 hours. Before the test, subjects need to clean their hands and forearms uniformly. The cleaning method is to wipe it clean, by dry facial tissue. 8.2 Determination The product's coating area and blank control area shall be randomly distributed, around the left and right arm's marking area, to ensure that the locations of all products and blank areas are statistically balanced.

9 Result calculation

Descriptive statistics are performed on the measured values of each test area, including quantity, mean, standard deviation, minimum, median, maximum values, etc.

10 Result judgment

Positive result. Before and after the use of the product, if there is a significant difference in the moisture content of the stratum corneum in the test area, it indicates that the test sample has a moisturization efficacy.

11 Test report

The test report shall include. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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