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ink,

pigmented fluid used for writing and drawing, or a viscous compound used for printing, both of various colors but most frequently black. The oldest known variety, India ink or China ink, is still used in China and Japan for writing with small brushes instead of pens. All inks are composed of a colorant, a vehicle, a solvent, and additives; the colorant for India ink is carbon black, and the vehicle is water; various substances including glue and gum are used to stabilize suspension. Because of its rich blackness and permanence, India ink is used extensively by architects, engineers, and artists. In many early civilizations dyes obtained from plants, and sepia from the squid, octopus, and cuttlefish, were used as ink. The black and blue-black inks used today, composed of copperas (ferrous sulfate), gallic and tannic acids, and a preservative, were probably known as early as the 2d cent., the acids then being derived from oak or nut galls. Numerous master drawings made with ink containing the acids of gallnuts have been corroded by the ink itself. These inks, and also the colored inks used today, contain aniline and other soluble dyes instead of holding their pigments in suspension; they are accordingly filterable and flow easily even through ball-point pens. Felt-tip markers contain organic compounds in solution. The glutinous inks used by printers owe their various viscosities to such ingredients as linseed oil, synthetics of the alkyd type, mineral oil, and petroleum fractions. This reliance on hydrocarbons has raised concern about pollution, and led to the development of several alternatives: vegetable–based inks; toluene–based inks so that the solvent can be recovered; and water–solvent inks. Marking inks used to mark linen are composed of a salt of silver. Indelible or incorrodible ink is used for writing that is exposed to the weather or to strong acids or alkaline solutions. Fluorescent inks are used in printing maps to be read at night. The liquid in the ink used in newspaper printing is absorbed into the paper, while in many other sorts of ink the liquid evaporates leaving the pigment above the paper surface.

ink

[′iŋk]
(materials)
A dispersion of a pigment or a solution of a dye in a carrier vehicle, yielding a fluid, paste, or powder to be applied to and dried on a substrate; writing, marking, drawing, and printing inks are applied by several methods to paper, metal, plastic, wood, glass, fabric, or other substrate.

ink

a dark brown fluid ejected into the water for self-concealment by an octopus or related mollusc from a gland (ink sac) near the anus
References in periodicals archive ?
Inkwell consists of 16 two-bedroom residences with prices anticipated to start at $1.
jahiz said that:" whenever put the wool, cotton and the things such that in the inkwell and to be encouter to stylus, is called ligheh".
If the clay contains iron oxides, which many African clays do, then a reducing environment changes the colour from red to black, as in the inkwell here.
Answer: It is a late 19th/early 20th-century bronze inkwell in the form of a bearded Cossack holding a beaker and carafe, his arms restrained by a rope, with glass eyes and hinged lid, mounted on an oval plinth base.
If you were lucky it would have a lift-up top or a shelf to store your exercise book and, when they were first introduced, there was a space in the corner for your inkwell.
Student editors at Armstrong Atlantic State University's student newspaper, The Inkwell, have filed a lawsuit against the university and its student government association, claiming their First Amendment Rights were violated after the paper's budget was cut.
A favorite with Black families for generations is The Inkwell beach adjacent to Oak Bluffs, the island's historical Black community.
A STRUGGLING school claims it is being left in the dark ages after cash shortages have left them using old-fashioned inkwell desks.
The Modbook is pre-installed with Mac OS X Leopard, Inkwell handwriting recognition, a 2.
It would be wrong for a star to dip into the gay press's inkwell to help open a movie or show and then go home and douse herself in Purell while saying three Haft Marys and two Our Fathers.
Covered inkwell machines incorporate linear-style inkwell with cover to shield ink from circulating air, debris, and to minimize solvent evaporation.