
loose material thrown on furnace hearth for protection
Found on
http://phrontistery.info/f.html

• (n.) The operation of shaving or smoothing the surface of undried clay ware. • (n.) A mixture of ore, cinders, etc., used to line the hearth of a puddling furnace.
Found on
http://thinkexist.com/dictionary/meaning/fettling/
Fet'tling noun 1. (Metal.) A mixture of ore, cinders, etc., used to line the hearth of a puddling furnace. [ Eng.] [ It is commonly called
fix in the United States.]
2. (Pottery) The operation of shaving or smoothing the surface of undried clay ware.
Found on
http://www.encyclo.co.uk/webster/F/23

Cleaning away of mould seams from slip cast ware. Sometimes also used loosely for any general cleaning up of pots, or the smoothing or trimming the surface of a hardening pot in preparation for firing.
Found on
https://ashbrook-ceramics.co.uk/pottery-glossary/

The removal of the seam left by the mould in greenware, by fettling knife and/or sponge.
Found on
https://walkerceramics.com.au/resources/glossary-of-ceramic-terms/

Cleaning of cast ware, especially the removal of the seams produced by joins in the plaster mould.
Found on
https://www.cromartiehobbycraft.co.uk/AdditionalDepartments/Footer-Content/

The removal of unwanted blemishes or seams with a sponge or knife from nearly dry pottery, prior to glazing and firing.
Found on
https://www.hot-clay.com/clay-glossary

Removing any excess clay using a fettling knife from the casting ware especially where it has gathered in the seams and joins of moulds.
Found on
https://www.ipsceramics.com/ceramics-glossary-of-terms/
No exact match found.