Abstract: Method for overprinting already printed packages includes preparing a raster or steel magnetic block which is provided with a clamping plate, wherein the block is engraved with the aid of a jet etching device and represents new texts or patterns which are applicable by tampon printing using specific inks on a located existing and already printed part of a box, drying, verifying and packing the box. The method is used for overprinting and includes masking an undesired area by printing a blanking pavement and afterwards by overprinting a desired text, instruction or a pattern thereon and uses an automatic line including a de-stacker (3) for automatically feeding boxes, at least one printing head (1), at least one drying tunnel (4) and at least one restacker (5).