Reference Book
Safety paper:- commonly used to add security to certificates of title and bank
cheques. This paper carries a printed image to thwart alteration by erasure and
carries an image in invisible ink that becomes visible if bleach is used to
chemically alter an image.
Book paper
Book papers are papers having high opacity so that it can carry print on both
sides. Used to print various products such as annual reports, pamphlets,
magazines, text books, posters, newsletters, journals, brochures, menus etc.
Different types of book papers are offset paper and text paper.
Offset paper:- used for offset printing. They have good opacity and ink
absorption. There are two types of offsest papers- uncoated paper and coated
paper (coated on one or both sides).
Text paper:- grade of paper made from either wood or cotton fibers.
Cover paper
It is a thick or heavy paper, typically used for the covers of books, catalogues,
brochures, manuals and similar publications.
Bristol paper
Heavy papers with at least 0.006” thick are termed bristols. Different types of
bristol papers are index bristol, post card bristol, tag board bristol, paper board,
blank and railroad board.
Utility paper
Papers that do not belong to these first four classifications are termed as utility
paper. Newsprint, label paper, synthetic paper, mineral paper are examples for
utility paper.
Newsprintis one of the lowest grades of printing paper. It is made by the
mechanical method of papermaking. Newsprint has very short fibers which
enables the paper to be folded easily in any direction. When new, it has a
grayish-white colour but it turns yellow and becomes brittle with age. Since
newsprint absorbs ink readily, a drying system on the press is not needed.
Label paperare paper coated with adhesive material. They must be able to
accept ink on one side and gumming on the other side without curling. Gum
will be covered by a wax coated releasing sheet.
Synthetic paperis a thin sheet of plastic with a clay coating on both sides that
accepts the ink. They are resistant to stains and tearing.