The secret to cool and functional bodies and glazes is a lot of testing.
The secret to know what to test is material and chemistry knowledge.
The secret to learning from testing is documentation.
The place to document is an account at insight-live.com.
Insight-Live.com Overview Video
A term used in ceramic to express the degree to which an item is safe and stands up to everyday use. Functionality embodies strength, hardness, resistance to acid attack and thermal shock, etc.