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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.
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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 ?
Qadeer Ahmed (Tehreek E Labbaik Pakistan) Crane, Danyal Chaudhry (Pmln) Tiger, Sumaira Gul (Ppp) Shehzada Imran (Independent) Well, Sheikh Rasheed Ahmed (Aml) Inkpot
Her death comes "as gentle as the top of the reed dipping its fibres in the inkpot, swifter than the ink being drunk by paper" (3).
Reacting with violence, Woolf turns upon the Angel, killing her, and, forever after, Woolf writes, "whenever I felt the shadow of her wing or the radiance of her halo upon my page, I took up the inkpot and flung it at her.
Then Ahmad came out with the book and his inkpot. When he saw the mat and the pillow, he said, "What's this?"
And there were two tiny spots of sun, one on the inkpot, one on a silver photograph frame, playing too.
As the cartoon tempest in an inkpot kicked up a storm, a genuine snow storm of historic proportions blew into Buffalo off Lake Erie.
Poet sublime of cryptic fabulosity, inkpot noirist, and restless chronicler of the muck and ick that splatters so freely, then embeds itself like a cancer, forming the blackest recesses of American consciousness.
Also we find a jar, which functions as an inkpot for the Poet and provides ink for preliminary sketching for the Painter.
Later was known as Katib an Nabi and Katib al-Wahi.18 Bukhari narrates: "Narrated al-Bara: There was revealed: laa yastawi al-qaiduna..."The Prophet said: "Call Zayd for me and let him bring the board, the inkpot and the scapula bone (or the scapula bone and the inkpot).
"The arrangements in the tent were very simple--a trestle table covered with an army blanket, an inkpot, an ordinary army pen that you could buy in a shop for two pence.
'Holmes picked up a quill, dipped it in an ivory inkpot and struck a bold line through Empereur River' From The Vaults Sherlock looks for the National hero Page 4 On Location James Milton finds plenty to admire in the laid-back atmosphere of a weekday card at Towcester Page 10 'Nowadays, when I meet a friend whom I have known for many years, our first talk is invariably about our respective ailments' Tony Morris Page 11 Where Are They Now?
He poured more wine and took it to the desk, leaving it in easy reach well away from the inkpot. He stood watching the quill spluttering its headlong way across the page, remembering the first time he had heard this man's miraculous words spoken in the theatre, and how they had fired him.