When unwinding or removing a tape from a surface, the appearance of "strings" of adhesive that hold to the original surface, stretch, and then release.
Legging can be exhibited when unwinding a roll, or in the end-use application. When peeling back adhesive backed products, one can witness the adhesive bonding to both the end use, and laminated materials. When this occurs, the adhesive strings between both materials upon removal. In an end-use application, legging can be the result of Plasticizer migration. In a roll of tape, legging can be the result of an inadequate release system.