There

> must be other printing
> museums with similar resources (as the Plantin

Museum)


The Musée de l'Imprimerie in Lyons, France is
excellent as well.

> > I'm still puzzled by the recesses cut into a
> copper plate, and how they
> > became flat-topped type slugs.
>
> I don't know where a copper plate comes into it?

Are you possibly thinking of the matrix itself? The
punches were cut out of steel, and then they were
impressed into a softer metal to create a recess,
which became the mold for the lead. This softer metal
was usually copper or brass.

Hope this helps,
Grendl.

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