Abstract: The invention relates to a metal plate (1) for a coin (2), for a centre pill (3) of a coin (2) or for a ring (4) of a coin (2), where it is suggested that at least one subregion of a surface, on at least one side of the metal plate (1), has a dual-coloured optical element (5) and that said optical element (5) has at least one first region (6) with a first oxide layer (7) of one first colour which is an interference colour, and at least one second region (8) with a second colour, the first colour being different from the second colour.

Abstract: The invention relates to a metal plate (1) for a coin (2), for a centre pill (3) of a coin (2) or for a ring (4) of a coin (2), where it is suggested that at least one subregion of a surface, on at least one side of the metal plate (1), has a dual-coloured optical element (5) and that said optical element (5) has at least one first region (6) with a first oxide layer (7) of one first colour which is an interference colour, and at least one second region (8) with a second colour, the first colour being different from the second colour.

Abstract: The invention relates to a metal plate (1) for a coin (2), for a centre pill (3) of a coin (2) or for a ring (4) of a coin (2), where it is suggested that at least one subregion of a surface, on at least one side of the metal plate (1), has a dual-coloured optical element (5) and that said optical element (5) has at least one first region (6) with a first oxide layer (7) of one first colour which is an interference colour, and at least one second region (8) with a second colour, the first colour being different from the second colour.

Abstract: Method for the production of a compound foil as an endless strip, the compound foil to be processed in the form of rectangular blanks covering a width of the endless strip characterized in that two different foil strips, of which a first strip contains an aluminum foil (4) or a paper are drawn through a lamination machine with tractive forces to overcome friction losses in the machine, these tractive forces producing different elongations in said two different foil strips, that one of the endless strips is provided at one side surface with a binding agent over a connecting surface, which consists of several partial areas (3, 13) separated from each other, that the two strips are connected to each other while the both strips being elastically stretched to different elongations as the strips are drawn through the lamination machine whereby after the two foil strips coming back again to their non-stretched starting state, that surfaces of the blanks each have one central area and two margin areas (9, 12) borderi