4.6 mil clay coated release liner.  Silicone coated on one side.  The non-silicone side is laser printable.  This liner is designed to withstand heavy processing, including die-cutting, marginal punching, perforating, and refolding.  This liner exhibits excellent layflat characteristics.
Basis Weight: 73.6 lbs. (Tappi T-410)

Release Range: 35-100 grams/inch (Tesa Tape 7475)

Moisture: 4.5%

Elemendorf: (Tappi T-414)
  Tear MD: 80 grams
  Tear CD: 90 grams