A pure clay that we dig straight out of the ground and grind into a powder. It is highly plastic and very smooth (fine particled) low temperature terra cotta clay. Its plasticity and dry hardness make it suitable in earth-mortars, green construction, pastes that need to be sticky and slurries that need to suspend well.


This clay has a low melting point. This makes it suitable as a bonding-agent or as an addition to bodies to reduce their vitrification range.

Fired bars. Top to bottom: Cone 4, 2, 02, 04, 06.

Physical Properties

 Drying Shrinkage: 8.0-9.0%

Sieve Analysis (Tyler mesh):

     +48: trace
   48-65: 0.1-0.5
  65-100: 0.5-1.5
 100-150: 2.0-4.0
 150-200: 6.0-8.0

Fired Shrinkage:

 Cone 06: 1.0-2.0%
 Cone 04: 3.0-4.0
 Cone 02: 6.0-7.0
  Cone 2: 7.0-8.0

Fired Absorption:

 Cone 06: 10-12%
 Cone 04: 5.0-8.0%
 Cone 02: 0.5-1.5
  Cone 2: 0.0-0.5

Safety Data Sheet

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Logo Plainsman Clays Ltd.
702 Wood Street, Medicine Hat, Alberta T1A 1E9
Phone: 403-527-8535 FAX:403-527-7508