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GB/T 4104-2017 English PDF

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GB/T 4104-2017: Determination of whiteness for zinc oxide produced by direct process
Status: Valid

GB/T 4104: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 4104-2017	English	119	Add to Cart	3 days [Need to translate]	Determination of whiteness for zinc oxide produced by direct process	Valid	GB/T 4104-2017
GB/T 4104-2003	English	159	Add to Cart	2 days [Need to translate]	Leucoscopic method for testing whiteness of zinc oxide made by direct process	Obsolete	GB/T 4104-2003
GB/T 4104-1983	English	199	Add to Cart	2 days [Need to translate]	Leucoscopic method for testing whiteness of zinc oxide made by direct process	Obsolete	GB/T 4104-1983

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Basic data

Standard ID	GB/T 4104-2017 (GB/T4104-2017)
Description (Translated English)	Determination of whiteness for zinc oxide produced by direct process
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H21
Classification of International Standard	71.060.20
Word Count Estimation	6,657
Date of Issue	2017-10-14
Date of Implementation	2018-05-01
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 4104-2017: Determination of whiteness for zinc oxide produced by direct process

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Determination of whiteness for zinc oxide produced by direct process ICS 71.060.20 H21 National Standards of People's Republic of China Replacing GB/T 4104-2003 Direct method zinc oxide whiteness test methods 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 4104-2003 "direct method zinc oxide whiteness (color) test method" compared with the GB/T 4104-2003, The main technical changes of this standard are as follows. --- Standard name changed from "direct method zinc oxide whiteness (color) test method" to "direct method zinc oxide whiteness test method"; --- Increasing the normative references; --- Added terminology; --- White board instead of white standard standard sample YSS006-1998; --- Increasing the sample requirements; --- Table 1 allows the whiteness difference from 95% adjusted to 85%; --- Added test report terms. This standard is proposed by China Nonferrous Metals Industry Association. This standard by the National Non-ferrous Metal Standardization Technical Committee (SAC/TC243) centralized. This standard is drafted by Hunan Shuikoushan Nonferrous Metals Group Co., Ltd., China Nonferrous Guilin Institute of Mineral Geology limited the company. Participated in the drafting of this standard.China Inspection and Certification Group Guangxi Co., Ltd., Guangxi Zhuang Autonomous Region metallurgical product quality inspection station, Lake South Nonferrous Metal Research Institute, Hunan Nonferrous Geological Prospecting Institute. The main drafters of this standard. Luo Yongfeng, Zhou deposit, Yu Canhui, Tang Jasper, Wu Xueying, Wei Weiping, Hu Yongmei, Huang Zhaomin, Pang Wenlin, Wei Xianghui, Xu Hongliu. This standard replaces the standards previously issued as. --- GB/T 4104-1983, GB/T 4104-2003. Direct method zinc oxide whiteness test methods

1 Scope

This standard specifies the direct method zinc oxide whiteness test method. This standard applies to the direct method of zinc oxide whiteness test.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 3494 direct method zinc oxide GB/T 3979 object color measurement methods GB/T 9086 for color and photometric standard whiteboard

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Whiteness whiteness The degree of white, the surface of the measured object in the visible region relative to completely white (standard white) the size of the object of the diffuse radiation Ratio, expressed as a percentage. 3.2 Whiteness value whitenessvalue The whiteness of any white object indicates the relative value of the whiteness of the PRD. Note. The blackness of the ideal perfectly reflective diffuser (PRD) surface with a spectral diffuseness index equal to 1 is 100 degrees white with a spectral diffuseness index equal to 0 The whiteness of the surface of the object is 0 degrees.

4 method principle

Sample and standard sample powder compactor pressed into tablets, at a wavelength of 457nm, the whiteness of the standard calibration of the whiteness meter, the measurement test Like the blue whiteness value.

5 instruments and standards

5.1 whiteness meter. 5.2 constant pressure powder sampler. Matching with the whiteness meter, tablet diameter 20mm ~ 40mm. 5.3 standard whiteboard. Ceramic standard whiteboard and powder standard whiteboard (magnesium oxide or barium sulfate), should be consistent with the provisions of GB/T 9086. ceramics Standard whiteboard, powder standard material should be placed in a desiccator to save light. For the convenience of measurement, a white ceramic plate with a smooth surface, no stains, no cracks and scratches that do not affect its usability may be used as the daily

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