Kamis, 28 Mei 2009

Paper Grades and Products

Newsprint and magazine
- Newsprint: paper mainly used for printing newspapers. It is made largely from mechanical pulp and/or waste paper, with or without a small amount of filler. Weights usually range from 40 to 52g/m² but can be as high as 65g/m². Newsprint is machine-finished or slightly calendered, white or slightly coloured, and is used in reels for letterpress, offset or flexo printing.
- Magazine paper: this is uncoated mechanical paper, suitable for printing or other graphic purposes where less than 90% of the fibre furnish consists of chemical pulp fibres. This grade is also known as groundwood or wood-containing paper and magazine paper, such as heavily filled super-calendered paper for consumer magazines printed by the rotogravure and offset methods.
Printing and Writing Paper
- Writing paper: this is uncoated woodfree paper, suitable for printing or other graphic purposes, where at least 90% of the fibre furnish consists of chemical pulp fibres. Uncoated woodfree paper can be made from a variety of furnishes, with variable levels of mineral filler and a range of finishing processes such as sizing, calendering, machine-glazing and watermarking. This grade includes most office papers, such as business forms, copier, computer, stationery and book papers. Pigmented and size press “coated ” papers (coating less than 5g per side) are covered by this heading.
- Printing paper: also known as coated papers, is all paper suitable for printing or other graphic purposes and coated on one or both sides with minerals such as china clay (kaolin), calcium carbonate, etc. Coating may be done by a variety of methods, both on-machine and off-machine, and may be supplemented by super-calendering.
Sanitary and Household
This covers a wide range of tissue and other hygienic papers for use in households or on commercial and industrial premises. Examples are toilet paper and facial tissues, kitchen towels, hand towels and industrial wipes. Some tissue is also used in the manufacture of babies nappies, sanitary towels, etc. The parent reel stock is made from virgin pulp or recovered fibre or mixtures of these. It is reported in the production statistics at parent reel weight before conversion to finished products. Import and export statistics however take into account trade in both parent reels and finished products.
Paper based packaging materials and products
- Case Materials: paper and board mainly used in the manufacture of corrugated board. They are made from any combination of virgin and recovered fibres and can be bleached, unbleached or mottled. Included are kraftliner, testliner, semi-chemical fluting, and waste-based fluting (Wellenstoff).
- Folding Boxboard: often referred to as carton board, it may be single or multiply, coated or uncoated. It is made from virgin and/or recovered fibres, and has good folding properties, stiffness and scoring ability. It is mainly used in cartons for consumer products such as frozen food and for liquid containers.
- Wrappings (up to 150 g/m²): paper whose main use is wrapping or packaging made from any combination of virgin or recovered fibres, bleached or unbleached. They may be subject to various finishing and/or marking processes. Included are sack kraft, other wrapping krafts, sulphite and grease proof papers.
- Other papers mainly for packaging purposes: this category embraces all paper and board mainly for packaging purposes other than those listed above. Most are produced from recovered fibres, e.g. greyboard, and go to conversion, which in some cases may be for end-uses other than packaging.
Other-Specialized Papers
This category includes other paper and board for industrial and special purposes, including cigarette papers and filter papers, as well as gypsum liners and special papers for waxing, insulating, roofing, asphalting, and other specific applications or treatments.

(taken from www.paperonline.org)

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