A book paper (or publishing paper) is a

paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distributed ...

that is designed specifically for the

publication To publish is to make content available to the general public.Berne Conve ...

of printed

book A book is a medium for recording information in the form of writing or images, typically composed of many pages (made of papyrus, parchment, vellum, or paper) bound together and protected by a cover. The technical term for this physical arr ...

s. Traditionally, book papers are off-white or low-white papers (easier to read), are opaque to minimise the show-through of text from one side of the page to the other, and are (usually) made to tighter

caliper A caliper (British spelling also calliper, or in plurale tantum sense a pair of calipers) is a device used to measure the dimensions of an object. Many types of calipers permit reading out a measurement on a ruled scale, a dial, or a digital dis ...

or thickness specifications, particularly for case-bound books. Typically, books papers are light-weight papers 60 to 90 g/m² and often specified by their caliper/substance ratios (volume basis). For example, a bulky 80 g/m² paper may have a caliper of 120 micrometres (0.12 mm) which would be Volume 15 (120×10/80), whereas a low bulk 80 g/m² may have a caliper of 88 micrometres, giving a volume 11. This volume basis then allows the calculation of a book's PPI (printed pages per inch), which is an important factor for the design of book jackets and the binding of the finished book. Different paper qualities can be used as book paper depending on the type of book. Machine-finished coated papers,

woodfree uncoated paper Woodfree uncoated paper (WFU), uncoated woodfree paper (UWF) or uncoated fine papers are manufactured using wood that has been processed into a chemical pulp that removes the lignin from the wood fibers and may also contain 5–25% fillers. Both s ...

coated fine paper Coated paper (also known as enamel paper, gloss paper, and thin paper) is paper that has been coated by a mixture of materials or a polymer to impart certain qualities to the paper, including weight, surface gloss, smoothness, or reduced ink absor ...

s, and

special fine paper Special fine paper is a classification of paper used for copying and digital printing. Copy paper Copy paper is used for copying and laser printers. The basis weight is 70-90 g/m2 (approximately 18-24 lb) and ISO brightness 80-96%. It is m ...

s are common paper grades.

References

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