ink


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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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Thailand's UV offset ink market is also growing fast as brands have turned to UV offset for the printing of premium whiskey boxes and the packaging of toothpaste, cosmetics and other consumer goods.
Consumers that receive a tattoo with the recalled ink may have a rash or lesions that consist of red papules in the area of the tattoo.
By 1990, the company started development and production for UV curing inks, and 1995, Megami Ink set up new manufacturing lines for UV curing inks inside the Gunma factory.
The Chinese artist Zhu Yong talking to reporter said that Ink wash painting uses tonality and shading achieved by varying the ink density, both by differential grinding of the ink stick in water and by varying the ink load and pressure within a single brushstroke.
The new range showcases a smart design that helps users simplify the ink refilling process.
3 kg degassed ink cartridges for the new generation Robustelli printers.
"You have to have an ink match that is consistent in color from batch to batch, and the anilox set up to deliver proper ink film thickness.
The demand for printing inks is expected to increase 1.8% annually through the year 2013 and reach a value of $4.8 billion, according to the study Printing Inks published by industry research firm the Freedonia Group, Inc.
The modern technology with UV radiation enables quick drying of a very thin UV ink layer by radical polymerization.
He adds that the Easyshare AiO printers use high-quality pigment-based ink versus dye-based ink that is used by the majority of ink-jet printers today.
Pad- and screen-printing equipment from Kent Engineering from the new KIPP-90 equipped with a 90 mm enclosed ink cup for one-color applications to the PP-350 with an 800 x 350 mm print area.
The OfficeMax Ink program involves installing Ink Filling Station kiosks in nearly 900 of its stores by the fall of 2006, enabling customers to refill their empty toner cartridges at what could be a 50 percent savings over purchasing a new cartridge.