i've seen a couple of posts on this subject and tried to answer my best. those posts weren't in fact variations, but of course these do exist.
a comb perf moves from top to bottom, often the machine would mess up and make holes left and right. These sheets would normally be destroyed, but some did make it out.
the terms are short stamp, tall stamp, blind perf. diamond perforated and even complete imperforated sheets.
i do not personally own diamond perforated or imperforated since they are quite rare and quite costly.
but below follows examples of the other variations
left stamp is a normal 8řre, right stamp is extremely short stamp from the 43th print this happens when the machine doesn't move down far enough
right stamp is the same boring normal one, and the left stamp is extremely tall stamp, this happens when the machine moves too far down leaving a very wide perf. usually happens on the last row.
blind perf happens when a needle breaks off, sometimes it's just the tip, which leaves a pressure so you can see the perf but it hasn't punktured. right stamp is another short stamp
All these perforation variations are quite rare, the diamond perforation even more so.
Posted 08/29/2016 03:16 am
