Oxides | Minerals | Materials | Recipes | Articles | Glossary | Hazards | Videos | Properties | Schedules | Temperatures | Tests | Troubles

•The secret to cool bodies and glazes is a lot 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.

Fire-Red

Plainsman Native Clay

Alternate Names: Plainsman FireRed

A natural, high iron, high temperature stoneware clay blend of a refractory low plastic red clay, a medium temperature medium plastic red clay and a bentonitic ball clay. Fire-Red has medium plasticity and is thus a plasticity nuetral additive to clay bodies. It is slightly sandy and by itself is a deep, solid red at cone 10R with speckle. It is stable to cone 12+. This material is a better choice for impart red color to medium and high temperature bodies than typical low fire red clays (the latter tend to flux to brown rather than red colors even in bodies with low feldspar).

This material is a possible alternative to Newman red fireclay with caveats.
-This material is more plastic (thus ball clay or bentonite in the recipe can be reduced to compensate)
-Fire-Red is a little more vitreous (thus feldspar can be reduced).
-Fire-Red has a much coarser particle size distribution so homogeneous red burning bodies will look less so and they will have a much more toothy feel.
-Fire-Red has less staining power, you may need to augment it with iron oxide.

Fired Temperature, Cone 6 7 8 9 10 11 10R
--------------------------------------------
Fired Shrinkage: 3.2% 3.4% 3.6% 3.6% 3.7% n/a n/a
Absorption: 8.2% 8.0% 7.8% 7.5% 7.1% n/a n/a
Fired Strength:
(lbs/ square inch) 3800 4200 4300 4300 4300

Sieve Analysis Wet Washed
(Root of 2 series) +35 +48 +65 +100 +150# +200 +325
--------------------------------------------
0.1% 0.5% 2.5% 5.0% 6.0% 11.0% 11.0%

Texture: Sl. tooth
Plastic Index (1-10): 5
Green Strength (lbs/sqaure inch): 800
Dry shrinkage: 5.5
Dried density: 2.06
PCE: 16.5

Varying sizes of iron speckle in a high-iron reduction stoneware clay

Cone 10R firing of Plainsman Fire-Red (left), St. Rose Red 42 mesh (center) and St. Rose Red 10 mesh (right). The 10 mesh material produces a reduction speckle and deep red color that is very unique.

Fire-Red and Restone fired test bars

Plainsman Fire-Red (left) fired at cone 8,9,10,11 and 10R and Redstone (right) fired at cone 4,5,6,7,8.

Fire-Red fired to cone 10R with Ravenscrag Slip as an inner glaze.

This can fire almost black on reduction. However, as a pure material, it is prone to dunting as it is high in larger quartz particles.

Out Bound Links

• (URLs) Fire-Red Data Sheet

  https://plainsmanclays.com/data/index.php?product=12906

• (Materials - Ingredient of) Saint Rose Red - High Temperature Red Stoneware, St. Rose, St Rose
• (Materials - Alternative) Newman Red Clay - High temperature red burning low plastic stoneware

  Newman Fireclay, Newman Slip

• (Materials - Ingredient of) M2 Red Stoneware - Medium temperature deep red burning stoneware

  Plainsman M2

• (Materials - Ingredient of) A1 Ball Clay - PR#3 A1, Pyritic bentonitic ball clay
• (Suppliers - Manufacturer) [histaddcheckbox] Plainsman Clays
• (Typecodes) 1: CLO - Clay Other

In Bound Links

• (Materials - Substitute) Plainsman Red Fireclay
• (Typecodes - Unspecified) 1: FRC - Fireclay
• (Materials - Related) Redstone - Plainsman Native Clay

  Red Stone

• (Materials - Unspecified) Calvert Clay - Red Burning Clay

XML for Import into INSIGHT