QB/T 4256-2011Guideline for evaluation of cosmetics moisturization efficacy (English PDF)
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Issued by
Ministry of Industry and Information Technology of PRC
Level / Type
National · Recommended
Issue date
December 20, 2011
Implementation date
July 1, 2012
Scope
QB/T 4256-2011 (Guideline for evaluation of cosmetics moisturization efficacy) is available as an English-translated PDF.
QB/T 4256-2011 — 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.
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Document preview — QB/T 4256-2011
National Standard of the People's Republic of China
- ICS
- 71.100.70
Issued by: Ministry of Industry and Information Technology of PRC
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.
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.
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.
......
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 7 pages — is available in the English PDF.
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