| 摘要 |
Substrates with electrically conductive layer(s) which is/are invisibly embedded. An Independent claim is also included for magnetic pigment inks (I) for use in combination with invisible electrically conductive layers, comprising pigments based on iron oxides, iron, nickel, cobalt and their alloys, barium or cobalt ferrites and hard and soft types of magnetic iron and steel, in solvent-free or solvent-containing aqueous dispersions such as nitrocellulose, acrylate polymer dispersions with a mol. wt. of 150000-300000, in acrylate-urethane dispersions or in acrylate-, styrene- or PVC-containing dispersions. |
