Woodvine added: “It’s low-tech time travel.”
The movie has been screened at film festivals including Venice, London, New York and Toronto.
Jenkin is preparing for a preview tour before the film’s national release on Friday 24 April.
He will meet audiences at his home cinema the Filmhouse in Newlyn on Tuesday 7 April, before other venues in Penzance, Falmouth, Redruth, Truro, Wadebridge, St Austell, Bodmin and Exeter.
Jenkin said he realised from previous film tours “the Cornish have a totally different take” on his work and “there’s a sense of ownership because it is a Cornish film” so they “may relate to the subject matter slightly differently”.