extender
1. In the adhesive industry, a substance, usually
one of some adhesive capability, which is mixed
into an adhesive in order to increase the amount
of the adhesive, and also at times to reduce CRAZING (1) . 2. A
transparent or semi-transparent chemical added in
powder form to a printing ink, either to alter the
strength of its color or to improve working
properties. (140 ,
309 )