"Bill Rubenstein" wrote: The opening through which the inside of the blank
is evacuated is small as compared to the diameter of the piece.(clip)
Leo?

Arch?
^^^^^^^^^^^^^^^^^^
That is essentially what is meant, but when you get involved in competition,
they get picky. I think my club defines it as a vessel with an opening of 1
1/2" or less, but I don't know whether there is a universal standard. If I
had to write a definition, it would be a certain percent of the maximum
diameter.

Years back, Lyn Mangiameli and I had running arguments about the validity of
judging a vessel by how small the opening is. I'd rather not get that going
again.