Tagging process where an impact stamp creates a recessed mark in the workpiece. Beskrivning The process The power source for the stroke vary in range from hammering and gunpowder charges to use of hydraulics or electromagnets. The choice of power source is controlled by the material type and desired results. The illustration shows the kind of electromagnetism where a current runs through a coil [1] and a magnetic marking pin [2] runs freely inside. The current creates a magnetic field that repels the marking pin which then pushes into the workpiece, leaving a depression in the surface corresponding to the mounted stamp [3]. Impact marking Process films Advantages and disadvantages In comparison with alternative methods Low price Can be manually operated Fully assembled products are difficult to mark Does not work on plastics