Digitalfire Ceramic Glossary



•The secret to cool bodies and glazes is alot of testing.
•The secret to know what to test is material and chemistry knowledge.
•The secret to learning from testing is documentation.
•The place to test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com

Sign-up at https://insight-live.com today.

Jiggering


A process for mass producing simple shapes on a mechanized pottery wheel having a solid swinging arm with a template. For plates, a profile describing the outside shape of the ware is used to force the soft clay against a rotating plaster mold describing the inside shape. For vessel forms, the profile forms the inside shape. After drying against the plaster the clay shrinks and releases and can be removed from the mold and the process repeated. After removal, fixup generally needs to be done to smooth any irregularities on the surface that was against the mold.

Typically, clay used for jiggering is much softer than that used for throwing on the potter's wheel. The work required to set up a jiggering process is significant and a number of mechanical and mold making skills are needed. RAM pressing is a better alternative for many shapes.

Pictures

A crock being jiggered by Jim Etzkorn in 2013 at the historic Medalta Potteries in Medicine Hat, Alberta.

Surface treatment affects glaze speck development in jiggered stoneware

Notice the inside of this large transparent glazed cone 6 stoneware bowl. There is a concentration of specks on one part because that area was sponged at the leather hard and dry stages to smooth surface problems that happened during the jiggering process. These specks are normally driven below the surface during forming.


By Tony Hansen




Feedback, Suggestions

Your email address

Subject

Your Name

Message


Copyright 2003, 2008, 2015 https://https://digitalfire.com, All Rights Reserved