A printing screen unit, comprising: a printing screen (12; 42; 62; 82; 112), comprising a metal sheet having two pairs of opposite edges; and first and second pairs of interface members (16, 16; 46, 46; 66, 66; 86, 86, 87, 87; 116, 116, 117, 117) bonded to each of the pairs of opposite edges of the sheet, wherein the interface members (16, 16; 46, 46; 66, 66; 86, 86, 87, 87; 116, 116, 117, 117) each include an engagement surface (28; 59; 78; 96; 142) for engagement to a tensioning mechanism and together define a frame, whereby the sheet is tensioned by applying a tension to the respective pairs of interface members (16, 16; 46, 46; 66, 66; 86, 86, 87, 87; 116, 116, 117, 117) by tensioning mechanisms,