A question. This is Scott 130, ACSC 146. Recess Printing. I can see a Guide Dot in my block of 4, but I can't figure out this extra line, visible on two different copies. Is this what is referred to as a Perforation Guide Line that, according to ACSC, is opposite the space between the 4th and 5th horizontal rows?
No, I am at a loss. Does not look perpendicular, so hand drawn line, or just an EFO
The sheets took 20 presses of the treadle to do one sheet of perforations the recess was done on dampened paper, so there was paper shrinkage. ergo, 4 sheets at a time were perforated, going by your examples, they look quite accurate.
Stages Printing Sheets dampened Flat Bed Press Inked Printed Left to dry (shrinkage)
Grouped by plate numbers Perforated Guillotined Checked Distributed
This is troubling (Collyer and Peck) unless I am misunderstanding
Stages of the 320 on should be
Printing Guillotined (4 sheets of 80) (If done after perforation, the sheets may slew under pressure) Gummed Perforated
When the bridge was built, grey was the only available colour in a large enough quantity to paint the entire span of the bridge. 272,000 litres of paint were required to give the bridge its initial paint.