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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 ?
Food and Drug Administration (FDA) has issued a recall for several lots and manufacturers of tattoo ink because they are contaminated with microorganisms.
Established in 1971 in Bangkok as a wholly owned subsidiary of the Toyo Ink Group of Japan, Toyo Ink Thailand started as a manufacturer of offset sheetfed inks.
Industrial Inks is the premier provider and one-stop shop for high-quality industrial ink refill and ink replacement products for your printing and industrial coding ink needs.
For Kyocera printheads Stork Prints offer NEBULA digital inks range; for Epson printheads FLARE digital inks collection is more suitable.
"Operators don't always understand inks. Many of them are not properly trained on how to use ink properly.
Lithographic inks will continue to be the most widely used inks in the industry, benefiting from the strong position of lithography printing, which offers advantages such as longer plate life, higher quality print performance, and lower ink consumption than other printing processes, according to the report.
The aim of this work is the comparison of the mechanical and chemical resistance of the conventional inks samples and UV ink samples.
Also uv-curing reactors for uv-curable inks on plastics, a line of dryers, bottle printers, and screen-printing accessories.
APV Engineered Coatings of Akron, OH, a leading producer of chemicals for the tire manufacturing industry, has formulated co-curable and disappearing inks for use in the RPS system.
Titanium and aluminum are often used as colorants in tattoos; more worrisome, inks using nonmetal colorants may include traces of antimony, arsenic, beryllium, chromium, cobalt, lead, nickel, and selenium (AESI filed over the latter eight metals).
THE ATTACHMENT FORCE OF INK TO PAPER IN PAPER RECYCLING OPERATIONS
Linx High-opacity grey ink 1310 adheres well to many materials, including metal, rubber and plastic.