Pressblech foils seem to have been used widely on Scandinavian helmets, and on some of the Anglo-Saxon helmets (Sutton Hoo, Staffordshire). If someone knows the answers, I have two basic questions about the process.

First, what is the correct spelling of "pressblech"? Various authors use "pressblech" (Coatsworth & Pinder 2002, Art of the Anglo-Saxon Goldsmith), "pressbleche" (Mortimer 2011), or "pressbleck" (Lindqvist 1925; Bruce Mitford 1949; Arrhenius & Freij 1992). Some authors even use different spellings in the same paper (Lindqvist 1925 uses "pressbleck" in Swedish, and "pressblech" in the German summary; Bruce-Mitford 1982, in The Journal of the Arms & Armour Society, uses both "pressblech" and "pressbleche"). Is there a difference between spellings?

Second, what exactly distinguishes the pressblech process from other forms of die stamping? It seems to be most frequently contrasted with (or confused with) repoussé work, but that seems to be completely different: punching the designs directly into the piece, rather than creating a die and mass-producing an identical pattern. Yet other forms of die stamping exists, not called pressblech. What distinguishes those forms of die stamping from pressblech?

Thanks in advance for any help!

Bumping this up in case anyone has any information.

"Pressbleck" is Swedish
"Pressblech/Pressbleche" is German. German grammar is an artform well above my head, I assume both spellings are correct depending on context.

As for the second question, pressbleck (I'll stick to the swedish term for patriotic reasons) are indeed pressed sheet metal in dies. I believe that at least one actual die was found at a site on Öland. And a related tradition in south Scandinavia are very thin small gold pressings (Guldgubbar) are found in post-holes and around built up sites. They seem to be way more common than pressbleck. It is tempting to see the pressblecks as an extended version of the tradition to press small gold leaf figures.

"Yet other forms of die stamping exists, not called pressblech. What distinguishes those forms of die stamping from pressblech?"

"Pressblech" involves a patrix, a positive image, rather than a matrix, which is the usual method of die stamping.

The foil is placed over the patrix and a yielding medium (lead, leather etc) is placed over the top of that and then hammered, forcing the foil down over the patrix.