All clays will crack, the best you can do is crack resistant clay:
CL155 - HUTCHINS RAKU
Great throwing smooth Raku clay body, light color with good crack resistance. Cone 06.
Cone 06, Wet Color gray, Oxidation Color tan, Reduction Color gray/tan, Texture medium, Shrinkage 7.0%, Absorption 10.0%.
* http://clayartcenter.net/store/customer/product.php?productid=16148&cat=&page=&js=n
i dont know sorry you should look it up on a different website that doesnt suck
Miry Clay is known as sticky clay.
clay is a non renewable resource
See: http://www.crest.org/discussiongroups/resources/stoves/Boyt/ceramics/ceramics1.html You could spend a lifetime studying clay and its uses. Clay is basically the stuff in dirt that is non-organic, and not sand and rocks. It is always associated with water, but dried-up lakes and streams are the best sources. Clays used by Southwestern Anasazi is a mystery. A thousand years ago they made pottery just millimeters thick that survives today. Nobody (the legend goes) knows the source of this white clay. But some clay as polymer and modlying clay is made out of chemical h2o and rubber.
To add colour to clay, it is best to allow the clay to dry completely, crush it to a powder, mix the dry colour powder and then rehydrate. Wear a mask, clay dust is harmful.You can also add wet colours to clay slip, the hardest thing is adding colours to clay when it is plastic.Mostly however the clay is not coloured, instead you colour the pot using slips or glazes.
pottery pieces crack during drying because the clay shrinks too fast and unevenly. If drying is controlled by wrapping pieces in plastic and allowing them to dry slowly, they won't crack usually.
Plasticine, a brand of modelling clay.
crayola
im not sure but i think they did sorry if this doesnt help :-]
Cheaper clay won't crack easier, it's more a product of how much water has been added to the mixture.
Clay
Any brand will do, as long as it has a timer and decent heat control for annealing glass, and can put out enough heat to handle the metal clay.
main cause is the hard soil which cannot be wetted by water.
Any temperature but for best results in a hot spot or freezing spot. Make sure you don't freeze the clay, burn it or crack it. Certain clays have to be at certain temperatures. All clay s different.
They come on Ford Explorer but just as G. Clay says, not a brand a style
Your question needs to be more specific for us to answer, for instance is the clay wet or dry, are you talking about geological formations of clay or a lump of potters clay. If you apply hand pressure to a lump of potters clay and the clay is wet it will squeeze (deform) between your fingers. If the clay is dry it will be too firm to deform by hand but if placed in a vice it will crack.......etc.
I have had nothing but good luck with Meguiars brand products. Meguiars offers a clay bar kit that comes with the clay bar, and a bottle of Meguiars quick detailer, which you spray on the surface of the vehicle before you use the clay. The quick detailer acts as a lubricant, and suspends contaminates to make cleanup easier.