This standard specifies the whiteness (color) test method for direct zinc oxide. This standard applies to the whiteness (color) test of direct zinc oxide. GB/T 4104-2003 Direct zinc oxide whiteness (color) test method GB/T4104-2003 Standard download decompression password: www.bzxz.net

GD/T4154—2003
This standard is a revision of GR/T41F4--1983. During the revision, the original manual pressing cake was changed to the mechanical cake forming machine to reduce the difference between the two.
The standard is for information.
This standard was replaced by B/24—1993 from the time of implementation. History of this standard: China National Nonferrous Metals Industry Association: This standard is under the jurisdiction of the State-owned Nonferrous Metals Standardization Technical Committee. This standard was drafted by the State-owned Nonferrous Metals Co., Ltd., and Liu Chongge Jinggan Co., Ltd. and Liuye Longcheng Chang1 General Factory assisted in the drafting. The main persons in charge of this standard are: Jun Bingya, Liu Yuansa Beiming, and the main verifiers of this standard are: Chao Guanhe, Yan Yan. This standard is issued by the National Standardization Committee of the People's Republic of China. The version of the standard replaced by this standard is: GT/T 4131-1985.
Direct method for the inspection of the color (color) of zinc oxide This standard specifies the inspection method for the color (color) of zinc oxide by direct method. This standard is applicable to the inspection of the color (color) of zinc oxide by direct method. 2 Principle of the method
GB/T4104-2003
The test sample and the standard sample are pressed together. The color of the test sample and the standard sample are measured on the concave meter. The color of the standard sample is 100, and the comparison value between the test sample and the standard sample is the test value expressed in percentage. 3 Instruments and standard samples
3.1 Color.
3.2 Powder forming apparatus.
3.3 Self-color standard S503s1958
3. 4 Instrument work case recording A (data recording) 4: Operation steps
4.1 Standard sample and test sample
Respectively take 128~15% zinc white standard sample and test powder molding solution, 4.2 After the machine is preheated for 10 minutes,
Input the prepared standard wave into the measurement port and calibrate it with the whiteness value of the standard sample as 100. 4.4
Take a standard sample, put the prepared test column into the limit mouth and press! Press the key, record the measured value three times. Change the three angles to measure and take the middle value. 4.5 Whiteness value is expressed as white fraction.
5 Allowance fee
The difference between the experimental results is not big. Table 1 Allowable difference
The middle is GB/T 4104--2003
(Informative Appendix)
Instrument working conditions
The working conditions of the WSB whiteness meter for measuring whiteness values ​​are shown in Tables AF. Table 1
How to measure
Maximum diameter
Indication value
Flat point screw type
3.0,1/smu
Surface mass
Indication typebZxz.net
Most complex
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.