Hadar's Clay™ One-fire Clays were developed to overcome the disadvantages of the older generation of Hadar's Clay products - namely, the Quick-fire clays. Quick-fire clays require 2-phase firing process with a cooling phase in between. Additionally, because of the changes in temperature due to the cooling phase, there is a high incidence of cracking, which require repair and re-firing.
The One-fire Clays overcome these disadvantages. They are fired in one phase only, and cracks rarely occur.
Please download the Instruction Manual for Hadar's Clay™ One-fire Clays.
Here are two beginners' projects.