I’m sorry for having problems two days in a row, but here’s another phenomenon that I’m not understanding. These two drop caps (48-point Rondo) were printed one after the other – same lockup, same ink, same paper, same packing, same everything – yet the print quality is markedly different. What could have made the difference? Are my form rollers out of round? How do you know when they need replacing? When I adjust the roller height, there is a bit of difference (maybe 2 points) between the height at the ends and the height in the center of both form rollers.
This was printed on a Vandercook No. 4 with packing consisting of 0.021″ Kimlon, 1 sheet of 0.006″ oiled tympan paper, and a 0.007″ Mylar drawsheet. The paper was Epson Velvet Fine Art, which is 100% cotton with a coating for inkjet printing. It is 0.019″ thick, for a total thickness of packing plus paper of 0.053″. I do try to feed the paper and turn the cylinder in the exact same way.
A closeup of the photograph is available on Flickr.
Thanks again for your always helpful comments.