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.

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 classic literature ?
The host, his mind at ease about his bill, placed pen, ink and paper upon the table.
As long as it was only the left drawer instead of the right, and red ink instead of black, I thought it must be the chance blunders of a forger, as you say.
But in the middle of them all, exactly where the paper with the red ink had lain, there lay something that looked like red ink spilt out of its bottle.
He was generally to be found at the Pen and Ink Club, an institution affiliated with the New York Players, of which he was a member.
The boy became quite stiff, and stood like a statue, looking into the ink in the hollow of his hand.
So far, it seemed to me to be juggling, accompanied by a foolish waste of ink.
The coming in here from the bedroom, with my pen and ink and paper, before sunrise--the sitting down at the widely- opened window to get all the air I could to cool me--the ceaseless writing, faster and faster, hotter and hotter, driving on more and more wakefully, all through the dreadful interval before the house was astir again--how clearly I recall it, from the beginning by candle-light, to the end on the page before this, in the sunshine of the new day!
The window contained photographs of more or less undressed dancing girls; nondescript packages in wrappers like patent medicines; closed yellow paper envelopes, very flimsy, and marked two-and-six in heavy black figures; a few numbers of ancient French comic publications hung across a string as if to dry; a dingy blue china bowl, a casket of black wood, bottles of marking ink, and rubber stamps; a few books, with titles hinting at impropriety; a few apparently old copies of obscure newspapers, badly printed, with titles like THE TORCH, THE GONG - rousing titles.
Then the customer of comparatively tender years would get suddenly disconcerted at having to deal with a woman, and with rage in his heart would proffer a request for a bottle of marking ink, retail value sixpence (price in Verloc's shop one-and-sixpence), which, once outside, he would drop stealthily into the gutter.
After I had been there about ten or twelve days, it came into my thoughts that I should lose my reckoning of time for want of books, and pen and ink, and should even forget the Sabbath days; but to prevent this, I cut with my knife upon a large post, in capital letters - and making it into a great cross, I set it up on the shore where I first landed - "I came on shore here on the 30th September 1659.
Pickwick demanded his writing-desk, and pen and ink, and was deeply engaged during the whole day.
As the schoolmaster said this, he saw that a small blot of ink had been thrown on one of the copies, so he took a penknife from his pocket, and going up to the wall, carefully scraped it out.