Method and system for creating co-layer surface adhesive rule

An apparatus for treating a cardboard workpiece, the apparatus comprising a rule die, the rule die comprising:

• a die body having a broad surface;
• and
• a plurality of elongate rules protruding above said broad surface of said die body in order that, when a cardboard workpiece is subjected to compression between the die and a counter die, said rules deform a surface of said workpiece facing the die to form elongate depressions therein,
• said rules being surface adhesive rules formed of a polymeric material and bonded to said broad surface, each rule of said rules having
• a respective first elongate surface facing said broad surface and bonded thereto, and
• a respective second elongate surface contiguous with said first elongate surface, which second elongate surface protrudes above said broad surface such that at least a polymeric region of said rule furthest remote from said broad surface contacts said surface of said workpiece during said compression.