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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 ?
Dr Inker has a patent pending (PCT/US2015/044567): precise estimation of glomerular filtration rate from multiple biomarkers.
Inker and Tarlie argue that retirement investors particularly are disserved by such an approach because it asks the wrong question, focusing on returns though an investor's interest is in having a target level of wealth at a predefined period of time.
In his analysis, Inker showed that the independent predictors of cardiovascular events in patients with 'normal' kidney function were age, hypertension and serum level of cystatin C (higher than 0.88mg/L).
Maintenance is also simplified --the opening of the inker units allows simple, single-level access to blankets, rubber rollers, and ink ducts for cleaning and setting.
Already on the cover of the Civil War trade paperback (and also on each cover of the seven comic book issues) we encounter the four names I am interested in, and which are again listed on the interior cover with their respective role: Mark Millar is the writer of Civil War, Steve McNiven the penciller, Dexter Vines the inker, and Morry Hollowell the colorist.
Lifelong city fan Mike Inker and Cardiff councillor Michael Michael are spearheading a campaign for a statue of Keenor to be built outside the club's planned new stadium.
Bedworth Theatre Guild committee member Mike Inker condemned those behind the attack and is now struggling to find a new storage area.
"It was nice to get my first win for England and I was glad to get the red inker [not out] to put us 1-0 up in the series.
Featuring an extensively annotated biography, this seminal work follows Kinstler's personal and artistic development from his first job as an apprentice comic book inker to his decision to leave the commercial art field and devote his life to portraiture.
Mum-of-six Katrin Inker, 32, from Newport, says she has not forgiven lover of seven years Paul Turner after he was jailed for three years.
Usually in comics there's a division of labor--a penciler, inker, writer, editor, colorist--but I did everything myself.
Ben Inker, head of asset allocation for money manager Grantham, Mayo, Van Otterloo & Co., dissects the economic scenarios that could guide the markets and its participants over the next four years in his latest quarterly report.