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GB/T 38910-2020 PDF in English


GB/T 38910-2020 (GB/T38910-2020, GBT 38910-2020, GBT38910-2020)
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GB/T 38910-2020: PDF in English (GBT 38910-2020)

GB/T 38910-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 91.140.70
Q 31
Sanitary wares - Test method of the marking
ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Requirements ... 4 
5 Equipment and materials ... 5 
6 Test methods of durability marking ... 5 
7 Test method of non-durability marking ... 6 
8 Test results ... 6 
9 Test report ... 7 
Sanitary wares - Test method of the marking
1 Scope
This Standard specifies marking requirements, equipment and materials,
durability marking test method, non-durability marking test method, test result
and test report of test method of the marking of sanitary wares.
This Standard is applicable to the test of the marking of sanitary wares.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 6952, Sanitary wares
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 durability marking
Durability marks on sanitary ceramic products, such as trademark marks.
3.2 non-durability marking
Non-durable marks on sanitary ceramic products, such as water level lines,
water efficiency labels and so on.
4 Requirements
4.1 Marking
It shall meet the requirements of GB/T 6952.
4.2 Durability marking
4.2.1 The trademark shall be printed in a visible position after the product is
installed.
NOTE: Smart toilet logo can be printed on the lid.
4.2.2 Durability marking shall have performances of moisture and heat
resistance, hot water resistance, scrub resistance, abrasion resistance,
corrosion resistance and so on.
5 Equipment and materials
5.1 Steel ruler: division value is1mm, range is 1000mm.
5.2 Humidity chamber: temperature range is 20°C~100°C, humidity range is
20%~98%RH.
5.3 Water heater: it is advisable to heat the water to 60°C with a water outlet.
5.4 Weak cleaning agent: commercial cleaner with pH of 6.5~7.5.
5.5 Strong cleaning agent: commercial cleaner with pH of 9~10.
5.6 Concentrated hydrochloric acid: density is 1.19g/mL.
5.7 Potassium hydroxide solution: 200g/L.
5.8 Acetone: concentration is 99%.
6 Test methods of durability marking
6.1 Humidity and heat resistance test (Procedure A)
Place the sample in an environment with temperature of (40±2)°C and relative
humidity of (98±2)% for 48h. At a distance of about 300mm from the sample,
dry with air whose pressure does not exceed 200kPa. Visually observe the
changes in the marking.
6.2 Hot water resistance test (Procedure B)
Use flowing water at (55±5)°C for 5min. Use a wet cloth to wipe clean. At a
distance of about 300mm from the sample, dry with air whose pressure does
not exceed 200kPa. Visually observe the changes in the marking.
6.3 Scrub resistance test (Procedure C)
Use a normal non-abrasive sponge or cloth to scrub the marking in a weak
cleaning agent for 15s. Scrub 1 time per second. Use running water to rinse
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.