To explain further as to what is involved in printing these
multicolour engraved painting stamps, Florian states that :the sheet below shows 5 single prints from each of the dies and the resulting print in five colours in register demonstrate how the final result is achieved..... ....The document (print run: 2,000) is sometimes referred to as Aachen proofs. It was published by the Czech Post to mark the Government Postage Stamp Printers' Association award for excellence in the category "Best Intaglio Stamp" issued in 2014-2015 for the stamp featuring the painting "Head of a Girl" by Hans von Aachen.
Engravers working on these dies for the Waite & Saville presses
had to interpret a painting on a stamp using just 5 or 6 colours.
Here is what Adrian mentions about Milos Ondracek the engraver
of the Hans von Aachen stamp."A large part of Ondracek's work consists of stamps depicting artwork, issued in the annual "Art" series of Czechoslovakia, and now the Czech Republic. These often form quite a challenge. Not only does a work of art need to be reduced in size enormously, without losing its characteristics, but there's the added problem of only having available a limited number of colours. The challenge is therefore to use several layers of engravings so that the five or six hues end up being a dazzling spectrum of colours."
See the whole article on Adrian's Stamp Engravers blog.http://stampengravers.blogspot.ca/2...k-milos.html