$ 0.00

Lincoln 60 Fire Clay - Dry Powder Clay

$ 1.60

Used for building kilns and wood fire ovens. ?ÿIt was first used in the late 1800s by Gladding McBean to make sewer pipe, subsequently for a wide range of architectural purposes. It is also used as a major ingredient in many commercial west coast USA stoneware and middle and high fire pottery clay and sculpture bodies. This material is very smooth and has a unique feel that many potters can recognize with their eyes closed!

Although this material is known as a fireclay, it completely vitrifies by cone 10 (where it is near zero porosity). it's porosity decreases steadily from cone 6 to 10, but it is beginning to bloat at cone 11. However, the fired shrinkage increases until cone 8 after which it bars begin to expand (indicating over firing).

Lincoln clay has several other very unusual properties also:
-It has excellent drying properties (resistance to cracking) even though it has high plasticity. It's drying shrinkage is below 6%.
-It is very plastic like a ball clay yet it feels like a kaolin (it is not sticky as are other clays of the same plasticity).
-27% water is required to make the Lincoln clay plastic enough to work for pottery (whereas a typical plastic pottery clay body is 20-22%). Yet it still has a fairly low during shrinkage! This is very unusual.