February Quiz of the Month

Welcome to our new feature, the Quiz of the Month.  I’ve enjoyed the occasional quiz we’ve had in the past, and suggested that we introduce a quiz on the first Monday of each month.

Today’s quiz comes via an interesting item from Special Collections.  Book artist Louise Levergneux has created a series that she calls City Shields.  She has taken photos of manhole covers throughout her travels and printed them on die-cut circles.  Special Collections has purchased the Iowa edition.

In the colophon, Ms. Levergneux details the type of printer she used, as well as the kind of paper (which we won’t tell you, because that would give away the answer to the quiz).  It is nice to see a contemporary artist leave hints for a future conservator.  Paper conservators increasingly need to know about the different types of digital printing processes and their inks.  Wilhelm Imaging Research’s website provides an excellent starting point for this research.

We took the photos below using a ProScope 200x digital microscope.  Our question to you is: can you identify what type of printing process was used in creating the City Shields?  [Note: all of these images represent the same printing process.]  Please post your best guess in the Comments section.  We would also like to know what other references our colleagues are using to identify how prints are created.


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