Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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tack ( tackiness )

1. A general term applied to the state or property of tending to adhere, the relative stickiness of an adhesive film, the resistance offered by an adhesive film to division of the adhesive surface, or the resistance offered by the adhesive (while in the plastic state) to removal of the adherends. Some printing inks, varnishes, and similar viscous liquids also display tack. See also: BLOCKING (2 , 3 ). 2. That property of an adhesive which results in a bond of considerable strength immediately after application and contact under low pressure. 3. The resistance of an ink film to being split between two surfaces, such as between rollers, between plate and blanket, or between blanket and paper. (164 , 309 )




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