Born in Vienna in 1940 Praschak worked as a designer at Knabstrup 1964-1970, before returning to Austria as head of Ceramics at the Linz school of Art. His wife Waltraud Praschak-Thalhammer, a graphic designer and Artist also worked at Knabstrup, and the style of their designs are often very similar. You can see a collection of their works on the Danish Knabstrup Specialist website HERE
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I have had one other plaque by Praschak that I know of which was on this site a few years ago - equally bold and beautiful :)