•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

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Dry Strength (Square Bars) - DSTR

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.


Formula for derice pounds per square inch tensile strength:

(3 * F * S) / (2 * W * D * D)

Where F = Force in lbs necessary to break the bar
S = Span in inches
W = Width of bar at break in inches
D = Depth of bar at break in inches

See DSRN test notes for more information.


FOR - Force (V)

WID - Width (V)

DEP - Depth (V)

SPAN - Span (V)

TMP - Firing Temperature (V)

VAL - Value (V)

Fired strength tester

Fired strength tester

Round or square fired bars are subject to a force that tests their tensile strength. The strength can be calculated from the force and the dimensions of the cross section where the break occurred.

Out Bound Links

In Bound Links

  • (Articles) The Physics of Clay Bodies

    Learn to test your clay bodies and recording the results in an organized way and understanding the purpose of each test and how to relate its results to changes that need to be made in process and recipe.

  • (Tests) DS - Dry Strength (kgf/cm2)
  • (Tests) FSTR - Fired Strength Square Bars
  • (Tests) MOR - Modulus of Rupture - Fired
  • (Articles) Binders for Ceramic Bodies

    An overview of the major types of organic and inorganic binders used in various different ceramic industries.

By Tony Hansen

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