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<p>[QUOTE=&quot;Numbers, post: 744000, member: 11668&quot;]One sheet goes through the second (face) printing operation with a corner folded down, so that some of the ink intended for the face side of that sheet actually ends up on the flexible &quot;blanket&quot; that presses the sheets against the printing plate. Then when the next sheet comes along, that ink ends up being transferred to the wrong (back) side of that sheet.</p><p>&nbsp;</p><p>What&#039;s interesting about your notes is that they&#039;re consecutive serials, and hence different plate numbers. So there must&#039;ve been three folded sheets in a row, creating offsets on three of the four plates that were on the press at the time. That&#039;s how each of the three notes manages to have a *different* amount of the face design present on the back.</p><p>&nbsp;</p><p>(Normally, an offset will only affect one of the four plates on the press, so every fourth note in the strap will show the error--always covering exactly the same portion of the note, but getting gradually fainter until it fades away entirely.)</p><p>&nbsp;</p><p>If a sheet is torn rather than folded, then the offset area can have an irregular boundary instead of a straight crisp edge like this. And if the press misfeeds completely so that no sheet is present at all, then the offset can affect the entire next sheet rather than just a small area of it....[/QUOTE]</p><p><br /></p>

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