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  2. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    It is primarily used for envelopes. The area of C series sheets is the geometric mean of the areas of the A and B series sheets of the same number; for instance, the area of a C4 sheet is the geometric mean of the areas of an A4 sheet and a B4 sheet. This means that C4 is slightly larger than A4, and slightly smaller than B4.

  3. Paper density - Wikipedia

    en.wikipedia.org/wiki/Paper_density

    Weighing scale to determine paper weight. Paper density is a paper product's mass per unit volume.The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).

  4. Paper recycling - Wikipedia

    en.wikipedia.org/wiki/Paper_recycling

    Waste paper recycling most often involves mixing used/old paper with water and chemicals to break it down. It is then chopped up and heated, which breaks it down further into strands of cellulose, a type of organic plant material; this resulting mixture is called pulp, or slurry.

  5. Book size - Wikipedia

    en.wikipedia.org/wiki/Book_size

    [4]: 67–70, 73–75 The size and proportions of a book depend on the size of the original full sheet. If a sheet 480 by 640 mm (19 by 25 in) is used to print a quarto, the resulting untrimmed pages, will be approximately half as large in each dimension: width 240 mm ( 9 + 1 ⁄ 2 in) and height 320 mm ( 12 + 1 ⁄ 2 in).

  6. Filter paper - Wikipedia

    en.wikipedia.org/wiki/Filter_paper

    Filter paper is a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solid particles from liquids or gases. Filter paper: used for separating solid from liquid.

  7. Riau Andalan Pulp & Paper - Wikipedia

    en.wikipedia.org/wiki/Riau_Andalan_Pulp_&_Paper

    In 2016 NGOs Greenpeace and WWF suspended partnership with APRIL Group after RAPP dug a canal through peat forest in breach of government regulation. [11] APRIL’s independent Stakeholder Advisory Committee accepted that the incident was the result of unintentional mistakes in interpreting and implementing government regulation.