There is provided a process for manufacturing a release liner, comprising the steps of providing a web of film; subjecting at least a first surface of the film web to a first plasma discharge treatment in the presence of a gas which effectively functionalises the first surface of the film web to provide thereon functional groups which are capable of actively binding to a release compound and/or a precursor thereof; and subsequently depositing a coating of a release compound onto the functionalised first surface of the film web by contacting a vapour comprising the release compound and/or a precursor thereof with the functionalised first surface during a second plasma discharge treatment.