Tackiness / Tacky
Tackiness is the characteristic of "stickiness" of a rubber. Most Chinese rubbers have some level of tackiness where you can lift up a ball by simply pressing the rubber on top of the ball, and raising it up. Non-tacky rubbers don't have this stickiness and will never pick up a ball, but they still have grip, so they can still generate a lot of spin on your shots, but not as much as tacky rubbers. Most Japanese and European rubbers are grippy but not tacky.