a mixture of carbon black, or other pigments, in a vehicle of mineral oil, linseed oil etc. Inks are formulated to dry by penetration, evaporation, oxidation, or by a combination of these, and also can be heat-set, cold-set, or moisture-set.
an ink used in printing and consisting of a pigment or pigments of the required color mixed with oil or varnish
... "Printing" means any process of reproduction of text and/or images in which, with the use of an image carrier, ink is transferred onto a surface and applies to the following subprocesses:
(i) Flexography: a printing process using an image carrier of rubber or elastic photopolymers on which the printing inks are above the non-printing areas, using liquid inks that dry through evaporation ...