GB/T 38998-2020 in English
VALIDCut-size office paper—Measurement of edge quality
- Issued on:2020-07-21
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
| Standard No: | GB/T 38998-2020 |
| Document status: | VALID |
| Title in English: | Cut-size office paper—Measurement of edge quality |
| Title in Chinese: | 裁切后办公用纸 边缘质量的测定 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-07-21 |
| Implemented on: | 2021-02-01 |
| Chinese Classification: | Y30-Papermaking in general |
| Professional Classification: | GB-National Standard |
| Related Keywords: | cut-size office paper measurement
office paper quality inspection system paper edge projection office paper edge quality |
| Related Topics: | Cutting standard
edge cutting paper version paper paper quality Mass Spectrometry Internal Quantification idt behind the standard office paper pure rear Final mass after thermogravimetric GBT38998 GB/T 38998-2020 |
《GB/T 38998-2020裁切后办公用纸 边缘质量的测定》由TC141（全国造纸工业标准化技术委员会）归口，主管部门为中国轻工业联合会。
Introduction
Analysis of the core content of the standard
This standard specifies the technical requirements for evaluating the degree of unevenness of the edges of cut office paper using the mass measurement board comparison method. During the test, the edge of the paper needs to be magnified 42 times or 44 times and compared with the standard gap value (1-6 levels) within a projection length of more than 200mm.
Comparison of key technical differences (GB/T38998 vs ISO22414)
| Comparison dimensions | GB/T38998-2020 | ISO22414:2004 |
|---|---|---|
| Citation standards | Adopt domestic standards such as GB/T450 and GB/T10739 | Citation of international standards such as ISO186 and ISO187 |
| Magnification | Specify 42/44 times and indicate in the report | No specific multiple requirement is specified |
| Results presentation | Merged into Chapter 8 unified presentation | Dispersed in 8.1-8.3 clauses |
Implementation points
Sampling plan example
A batch of 2500 reams of office paper should be delivered. According to the sampling rules in Table 1, 4 reams of samples should be taken, and 6 sheets of paper should be taken from each ream for four-edge inspection. Special attention should be paid to avoid human touch affecting the original state of the edge.
Edge quality judgment example
When the highest point of the paper edge projection is close to the "3" gap and the lowest point matches the "4" gap (as shown in Appendix B), the smaller value 3 should be taken as the judgment result of this position. If multiple fibers protrude, "H" should be marked after the average value.
Background of Standard Evolution
When this standard was revised and adopted from ISO22414, three important adjustments were made in view of the characteristics of China's papermaking industry: 1) Deletion of the correlation statement with ISO216; 2) Simplification of the paper direction test requirements; 3) Strengthening of the clarity of equipment parameters. This reflects the standardization process of my country's office paper quality inspection system.
Application Recommendations
- During procurement acceptance, suppliers should be required to provide inspection reports that comply with GB/T38998
- For high-speed copier paper, it is recommended to control the edge quality to ≤ Level 4
- Regularly check the accuracy of the observation equipment magnification
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