When I started to buy and sell pottery, there were some terms that I picked up pretty fast that I use quite often. These terms are pretty common and help describe the manufacturing process of the piece. Here’s some of the terms:
Pinholes—these are faults in the surface of a ceramic body (or even the glaze) that resemble pin pricks. These are not very big at all, and there is usually no other damage around them. Air bubbles are the most common culprit that causes these.
Bloating—this is the permanent swelling of a ceramic piece during the firing in a kiln. It’s caused by the expansion of gases like air not being able to escape out of the piece.
Iron oxide—this is a common oxide in glazes and some clays that generally gives the item a reddish color.
Biscuit pottery—this is also called Bisque pottery. This is pottery that has been fired, but no glaze has been applied to the piece.
This is only a few of the terms out there. What have you heard?