Printing and writing paper
From Wikipedia, the free encyclopedia
Printing and writing papers are paper grades used for newspapers, magazines, catalogs, books, commercial printing, business forms, stationeries, copying and digital printing. About 1/3 of the total pulp and paper marked (in 2000) is printing and writing papers.[1]
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[edit] Writing paper standards
| Specifications | MD/CD | Unit | Level A | Level B | Method |
|---|---|---|---|---|---|
| Substance | gsm | 80-120 | 60-80 | TCVN 1270:2000 | |
| Durable ≥ | mN.m²/g | TCVN 3229:2000 | |||
| MD | 5.7 | 4.1 | |||
| CD | |||||
| Tearing strength ≥ |
m | TCVN 1862:2000 | |||
| MD | 3800 | 3200 | |||
| CD | 2200 | 1800 | |||
| Water absortiveness Cobb[disambiguation needed] 60 |
g/m² | 23 | 23 | TCVN 6726:2000 | |
| Brightness ISO ≥ | % | 78 | 70 | TCVN 1865:2000 | |
| Opacity ≥ | % | 85 | 85 | TCVN 6728:2000 | |
| Roughness Bendtsen ≥ |
ml/ minute |
280 | 400 | TCVN 3226:2001 | |
| Ash content ≥ | % | 3 | 3 | TCVN 1864:2001 | |
| Moisture content |
% | 7+/-1 | 7+/-1 | TCVN 1867:2001 |
[edit] Types
[edit] History
Main article: History of paper
[edit] Production
Main article: Paper machine
[edit] References
- ^ Paulapuro, Hannu (2000). "1". Paper and Board grades. Papermaking Science and Technology 18. Finland: Fapet Oy. pp. 14–51. ISBN 952-5216-18-7
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