[Ansteorra] question on ceramics and its history

[Cairenn Day]

I have a notion that the problem with slip casting in period was the
defloculant (the ingredient that helps to hold the clay, in suspension
was not known or used, so the slip would 'settle' too quickly.  The
Romans, also used molds, but it seems that they threw into them, so a
raised design would be on the outside.

Cairenn, The Howling Artist