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A binding agent such as gelatin or, more commonly, shellac may be added to make the ink more durable once dried. India ink is commonly sold in bottled form, as well as a solid form as an inkstick (most commonly, a stick), which must be ground and mixed with water before use. If a binder is used, India ink may be waterproof or non-waterproof.
The coatings and inks industries prefer grades of carbon black that are acid-oxidized. Acid is sprayed in high-temperature dryers during the manufacturing process to change the inherent surface chemistry of the black. The amount of chemically-bonded oxygen on the surface area of the black is increased to enhance performance characteristics.
Iron gall ink (also known as common ink, standard ink, oak gall ink or iron gall nut ink) is a purple-black or brown-black ink made from iron salts and tannic acids from vegetable sources. It was the standard ink formulation used in Europe for the 1400-year period between the 5th and 19th centuries, remained in widespread use well into the 20th ...
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Nearly all stamps get their color from inks printed on white or light-colored paper; the handful of exceptions include early issues of Natal consisting only of embossing on colored paper, [1] some recent stamps embossed on gold foil or with foil blocking to achieve a metallic appearance, and the Uganda Cowries produced on a typewriter.
Ink is rolled onto the surface of the block, dry paper is placed on top of the block and it is printed either by rolling both through a press, or, by hand, using a baren to rub the ink from the surface of the block onto the paper. In a relief print, the engraved lines show white.