What is a release liner?

release liners label layers
A release liner is a layer in a label roll or sheet that carries the pressure-sensitive label material until it is ready for its next step. Sometimes called a ‘carrier’ or a ‘backing,’ release liners hold onto or carry the sticky substrate until whatever they’re carrying is ready to be released. The release liner can be film-based, paper-based, polycoated paper-based, or even unique substrates like metalized papers/films as their base. Release liner substrates are often coated with silicone, which allows whatever the liner is carrying to release when the time is right.