Hi Gerrit,
I have been aiming at creating a blackletter font
(http://unifraktur.sourceforge.net/maguntia.html)
Cool!
• The four “required” ligatures ch, ck, ſt and tz, which were never
separated in typesetting. These can be realised in the very same way
as antiqua ligatures.
Your page draws my attention to "ſch". To typeset this as "ſ ch" in
circumstances where spacing-out (positive tracking; German: "gesperrt")
is used for emphasis has always irritated me, but I guess that's just
how it's mostly been done ... do you have more information on this? How
often was the entire "ſch" kept together in such circumstances?
there were many [long s (ſ)] [in] Antiqua text
Historically yes, but in the end, long s was considered restricted to
blackletter; I think this was even written into the orthographic rules
from 1901.
Stephan