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GB/T 13531.6-2018 English PDF (GBT13531.6-2018)

GB/T 13531.6-2018 English PDF (GBT13531.6-2018)

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GB/T 13531.6-2018: General methods on determination of cosmetics -- Determination of particle size

This Part of GB/T 13531 specifies the determination of particle size for cosmetics. This Part is applicable to the determination of particle size for the powdery and granular cosmetics.
GB/T 13531.6-2018
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 71.100.70
Y 42
General Methods on Determination of
Cosmetics ?€? Determination of Particle Size
ISSUED ON. FEBRUARY 06, 2018
IMPLEMENTED ON. SEPTEMBER 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Apparatus ... 4
5 Test Environment Conditions ... 5
6 Test Process ... 5
7 Result Expression ... 5
8 Precision ... 6
Foreword
GB/T 13531 General Methods on Determination of Cosmetics can be divided into the following parts.
--- GB/T 13531.1 General Methods on Determination of Cosmetics ?€? Part 1. Determination of pH;
--- GB/T 13531.3 General Methods on Determination of Cosmetics ?€? Part 3. Determination of Cloudiness;
--- GB/T 13531.4 General Methods on Determination of Cosmetics ?€? Part 4. Determination of Relative Density;
--- GB/T 13531.6 General Methods on Determination of Cosmetics ?€? Part 6. Determination of Particle Size;
--- GB/T 13531.7 General Methods on Determination of Cosmetics ?€? Part 7. Determination of Refractive Index.
This Part belongs to Part 6 of GB/T 13531.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part was proposed by China Light Industry Council.
This Part shall be under the jurisdiction of National Standardization Technical Committee on Flavor Fragrance and Cosmetics (SAC/TC 257).
Drafting organizations of this Part. Shanghai Research Institute of Daily Chemical Industry, Infinitus (China) Co., Ltd., Proya Cosmetics Co., Ltd., Osmun Biological Co., Ltd., Guangdong Bawei Bio-Technology Co., Ltd., and Suzhou Shipu Testing Technology Co., Ltd.
Chief drafting staffs of this Part. Wang Shu, Wang Tao, Sun Shurong, Wang Jing, Leng Qunying, Liu Ruixue, and Che Wenjun.
General Methods on Determination of
Cosmetics ?€? Determination of Particle Size
1 Scope
This Part of GB/T 13531 specifies the determination of particle size for cosmetics. This Part is applicable to the determination of particle size for the powdery and granular cosmetics.
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) are applicable to this document.
GB/T 6003.1 Test Sieves - Technical Requirements and Testing - Part 1. Test Sieves of Metal Wire Cloth
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Particle size
Use the standard sieve with prescribed pore size to screen the granular or powdery sample; the percentage of the mass of sample passing through the standard sieve accounting for the sample mass.
4 Apparatus
4.1 Standard sieve. it shall meet the requirements of GB/T 6003.1; the round sieve with diameter of 60mm; select the pore size according to the requirements of product standard.
4.2 Soft brush. the brush length is 50mm; while the brush width is 40mm.

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