Digitalfire is facing a takedown order from Plainsman Clays. They are revoking permission to "use any Plainsman content" "on any platform". This is broad and vague enough, and this site large enough, that I am unable to comply or even interpret it in the short timeframe (June 27). Please don't panic, I am overwhelmed by the unbelievable support I am getting. We just need to get them to relent on this demand and call off the lawyer (to at least permit commentary). There are lots of backup sites (many people have the API endpoints), don't start downloading or scraping again and overload the server.

Insight-live.com general operation is not affected by this.

Materials for Ceramics

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Plainsman Fireclay

Alternate Names: PFC

Description: Plainsman Fireclay

Oxide	Analysis	Formula
K2O	2.10%	0.08
MgO	0.20%	0.02
Na2O	1.00%	0.06
TiO2	0.70%	0.03
Al2O3	27.00%	1.00
CaO	0.20%	0.01
SiO2	58.10%	3.65
Fe2O3	2.00%	0.05
LOI	8.70%	n/a
Oxide Weight		344.91
Formula Weight		377.78

Notes

A buff firing, medium plasticity, slightly toothed fireclay. Ideally suited as a refractory agent to reduce body maturity, yet not adversely affect its working and drying properties, or overly darken its fired color.

This material is good substitute for the popular but discontinued AP Green Missouri Fireclay. It fires to a similar color and is a bit more refractory.

Fireclays are often inexpensive and thus coarsely (or even erratically ground). They are implicated in lime-popping. Fireclay should be ground to at least 30 mesh to eliminate this problem.

Related Information

Links

Articles	Duplicating AP Green Fireclay Few people actually understood what AP Green fireclay really was (it is no longer available). By carefully ascertaining its physical properties we were able to formulate a substitute material mix.
URLs	https://plainsmanclays.ca/data/index.php?product=12904 PFC Data Sheet
Materials	Cedar Heights Fireclay
Materials	Hawthorne Bond
Materials	Imco 400 Fireclay
Materials	APG Missouri Fireclay
Materials	Fireclay
Materials	Plasticfire
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.
Typecodes	Fireclay Fireclays are non-kaolin non-ball clay materials similar to stoneware clays but lacking fluxing oxides. Many fireclays have a PCE of 28 or more.
Typecodes	Fireclay Fireclays are non-kaolin non-ball clay materials similar to stoneware clays but lacking fluxing oxides. Many fireclays have a PCE of 28 or more.

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By Tony Hansen
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