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 )