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Available as a Product on the Downloads page
Use this to make length marks in standard SHAB test bars (for testing clay body or clay material drying shrinkage, firing shrinkage and fired porosity). This can be 3D printed. The markers are 10cm apart (outside edges). Most printers can achieve this measurement accurately. To be sure check yours using a caliper, if it is not close to 10cm adjust using sand paper or reprint using an adjusted dimension.
Available as a Product on the Downloads page
Available on the Downloads page
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This is for making test bars of slip casting clays bodies for use in the SHAB test (to measure drying shrinkage, firing shrinkage and fired porosity). I designed it in Fusion 360 and 3D printed the light-duty rails and case mold. I poured plaster into that to make the two plaster working mold halves (top right). The funnels provide a reservoir so the bars be cast solid. This mold can produce a set of three bars in less than an hour.
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Code numbering is an essential part of any testing program. This type of stamp is ideal for stamping code numbers and other information on plastic clay test specimens (e.g. SHAB test bars). Set up the run or recipe number on the left and the specimen number on the right. You can find these stamps on Amazon by searching "12 digit rolling alphabet symbol number stamp".
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Suddenly, ware is coming out of your production kiln warped or cracked or off color. Unless the answer is obvious, the first action should be to compare its drying and firing test data with past runs. If you are doing that as a routine, then SHAB test bars (and the test result data they bring) will already be available. These bars are tests of slip casting bodies, they can be made in a plaster mold and length-marked as shown. That data is a characterization of the clay body. The value of this kind of data-gathering becomes evident when a disaster happens (or better yet, is prevented). Clay bodies have plasticity, dry performance, dry strength, fired density, fired shrinkage, fired strength, etc. If you have historical data (accompanied by firing schedules, recipes, etc), you have an invaluable tool. Where does one gather the data? In spreadsheets? No, in a database. An account at Insight-live.com is specifically intended for this.
Tests |
Shrinkage/Absorption Test
SHAB Shrinkage and absorption test procedure for plastic clay bodies and materials |
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