Mark Tomasko submitted these additional thoughts on siderography. Thanks! -Editor
While it is very kind of David Gladfelter to cite my book for a definition of siderography, there is a definition in the Random House Dictionary
of the English Language, Unabridged Edition, 1966:
"1. the art or technique of engraving on metal;
"2. the method of increasing the number of reproductions obtained from a steel engraving by first rolling a soft-steel cylinder over a
hardened steel plate and then rolling the hardened cylinder over a soft-steel plate."
It is this second definition that applied to the bank note industry.
other comment on the discussion of siderography. David says in the last paragraph "Interestingly, the term "siderographer" did not
catch on with the artisans themselves." Actually, in 1921, the "Steel Plate Transferrers Association of America" changed its name to
the "International Association of Siderographers." This information comes from their 50th Anniversary commemorative booklet of 1949, the
cover of which shows one of Foringer's allegorical figures looking at a transfer press and the union's name in rather modernistic script (the
cover, which is naturally printed in intaglio, was produced by American Bank Note).
A 1970 membership certificate I have shows the same name.
Siderography lasted for about 150 years, with the photo-etch transfer replacing siderography in the 1980s-early 1990s. And since then the computer
has replaced a lot more.
To read the earlier E-Sylum article, see:
ON SIDEROGRAPHIC BANK NOTE PRINTING (www.coinbooks.org/esylum_v17n53a15.html)
Wayne Homren, Editor
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