Hinge-lid container for consumer articles and a method to form a hinge-lid container

A method of forming a hinge-lid container for consumer articles, the method comprising the steps of:

• providing a container blank defining an outer surface and an inner surface, the container blank comprising a box portion for forming a box and a lid portion for forming a lid;
• forming a weakening line on the outer surface having a width of between 0.1 millimetre and 1 millimetre, the weakening line forming a hinge for the lid portion so that the lid portion is movable from a closed position to an active position on the box;
• providing an electric conductive trace on the outer surface, including providing the electric conductive trace across the weakening line;
• and
• folding the container blank to form the hinge-lid container,
• wherein the electric conductive trace forms a closed circuit when the lid portion is in the active position and the electric conductive trace forms an open circuit when the lid portion is in the closed position.