This release paper is widely used in the picture framing industry. It will help eliminate adhesive residue from getting on your heat press lid. Place either side of this double-sided silicone coated and moisture-stable release paper on top of or underneath exposed adhesive to prevent the adhesive from transferring to heated platen of vacuum or dry mount press. This high quality silicone release paper is a heavy weight 50-60 lb paper. Product R is wound on 3 inch cores to eliminate release curl. The release paper is tested for 4 hours at 300 degrees F to establish its silicone layer durability and dimensional stability. It is also measured for ease of release and resistance to water and solvents.