Method for producing release liner

A method for producing a release liner, the release liner comprising a plant-derived film substrate;

• and a release coat layer lying on or over at least one side of the film substrate, the release coat layer derived from a thermosetting silicone resin, the method comprising the steps as follows:
• Step A of applying a thermosetting silicone release agent to at least one side of a plant-derived film substrate to form a coat layer thereon, the thermosetting silicone release agent comprising 100 parts by weight of a thermosetting silicone resin and 0.05 to 0.55 part by weight of a curing catalyst;
• Step B of drying the coat layer after Step A at a temperature of from 40° C. to 90° C. for a duration of from 10 to 60 seconds;
• Step C of applying an ultraviolet ray to the coat layer after Step B at a dose of from 50 to 300 mJ/cm2;
• and
• Step D of aging the coat layer after Step C at a temperature of from 30° C. to 70° C. for a duration of 12 to 240 hours.