•The secret to cool 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 test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com
Drying Shrinkage - DSHR
This test procedure was employed in the Foresight Ceramic Database and now is available for those having an account at Insight-Live.com.
Accumulating test data using the variables defined in these procedures enables us to create tools that enable you to compare the physical properties of materials and recipes.
Specify the % water content. This is normally based on plastic length, thus to calculate:
( plastic size - dry size ) / plastic size * 100
It is easiest to make bars with a 100mm mark. Then the shrinkage is just 100 minus the dry measurement.
For a comprehensive test to measure shrinkage and porosity, see the SHAB test.
VAL - Value (V)
Specify the % shrinkage from wet
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By Tony Hansen