Post #265167 by squid on Tue, Nov 7, 2006 10:26 PM

It's a practical glazing issue mostly.

The entire mug is dipped in glaze after it's fired the first time (bisque). If the bottom is flat, the glaze must be completely wiped off or the mug must be put on little "stilts" so it doesn't fuse to the kiln shelf.

If the bottom is indented, a quick wipe leaves only the center glazed. This also allows the addition of incised logos, decals, etc.