Printing and writing paper
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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[disambiguation needed  ] A |
Level[disambiguation needed ] B |
Method |
|---|---|---|---|---|---|
| Substance[disambiguation needed ] |
gsm | 80-120 | 60-80 | TCVN 1270:2000 | |
| Durable[disambiguation needed ] ≥ |
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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