not shown in order for the coating to acquire the desired properties the heating in the heating zone 11 is preferably direct but contactless and makes use of controllable high power heating equipment 12 such as irradiation laser microwaves or similar or some other high power technique equipment upstream and in direct connection with the coating position the substrate 10 may optionally be pretreated preferably for increased adhesion by activation of its surface increasing the surface energy by e g flame treatment symbolised by arrow 15 preferably the substrate is a substrate for a packaging laminate preferably comprising one or more layers in the group that consists of a fibre based core layer a polymer core layer a gas barrier layer such as of aluminium or a polymeric material an adhesive layer a liquid barrier layer and a sealing layer optionally the surface of the polymeric pulverous particles may be affected pretreated e g to counteract agglomeration of the pulverous particles in the suspension preferably by treating the pulverous particles or by addition to the suspension of an agent that affects the surface such as a tenside the invention is not restricted to the shown embodiment but can be varied within the scope of the claims it may for example be conceived.