As the subject reads, my question is why does impressioning work? Wouldnt there always be pressure on the pins causing a mark to be made? In essence each pin is just a long pin with a break in the middle, and all the springs are of standard tension. So why is there no mark when the shearline is formed? Wouldnt there be a markings until the spring is fully at rest? It obviously works, just wondering why.
17 years ago