In Poland, according to the standards, paper products are: paper (grammature to 250 g/m2) and cardboard (from 250 g/m2). According to international regulations, the border is 225 g/m2. There is also a customary division: - tissue-papers (to 28 g/m2),
- papers (from 29 to 160 g/m2),
- thin cardboards (from 161 to 315 g/m2),
- cardboards (from 315 g/m2),
- bibulous papers (from 65 to 250 g/m2).
The clasification of papers using for printing: - luxury printing papers
- papers for printing multicolor magazines
- news-papers
- special papers
- multicoat cardboards for printing, also high processed
Characteristic of paper depends on its properties, for example:
some of size and structure
properties : | - grammature
- thickness
- volumen
- size
- size stability
- smoothness
- cihesion of the basis
- doublesizing
- anizotrophy | some of durability properties: | - extensibility
- tearing durability
- partly tearing durability
- bending durability
- breaking durability
- hardness
- softness
- stratifying resistance | some of optical properties: | - whiteness
- tint
- polish | some of properties hydrophoboic and hydophilic: | - absolute moisture of the paper
- relative moisture of the paper
- proneness to waving
- water resistance | some of special properties : | - time resistance
- proneness to powdering
- proneness to electrifying
- lye resistance
- printability |
(Stefan Jakucewicz: "Papier w poligrafii", Inicjał Warszawa 1999) |
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