Monthly Tech-Tip from Tony Hansen SignUp

No tracking! No ads!

1-9 | A | B | C | D | E | F | Frits | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

Roseville Clay

Oxide Analysis Formula
CaO 0.37% 0.03
K2O 2.51% 0.12
MgO 0.21% 0.02
Na2O 0.31% 0.02
TiO2 1.66% 0.09
Al2O3 23.41% 1.00
SiO2 60.89% 4.41
Fe2O3 2.12% 0.06
LOI 8.51%n/a
Oxide Weight 398.59
Formula Weight 435.66


A selectively mined stoneware clay this is exceptionally cean and when ordered in 200 mesh offers the potter a stoneware fireclay which works well by itself or in compound bodies. The fired color is warn buff and it has a firing range of cone 1 to 8. This material will respond to deflocculnts and can thus be used in slip casting bodies.

This has been used for over 100 years by Roseville and Zanesville, OH potters. Some add small amounts of grog to impart texture and improve drying.

Related Information


Materials Goldart
Materials Redart
The most common commercially 200 mesh available raw terra cotta clay in North America. It fires red, has low plasticity and matures a low kiln temperatures.
Materials Ceramic Fireclay
Materials Salt Lick
Typecodes Clay Other
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.


Pyrometric Cone Equivalent 23
By Tony Hansen
Follow me on

Got a Question?

Buy me a coffee and we can talk, All Rights Reserved
Privacy Policy