|Monthly Tech-Tip |
The clay was wedged thoroughly, rolled to 3/8 thickness (using the metal rods as gauges) and cut to 4 1/4" long by 1" wide bars. Code numbers and specimen numbers are stamped on each bar (these are needed to enter data into Insight-live). For examle, notice that the bars have specimen numbers from 1 to 6. These will be fired at six different temperatures (for a low temperature body, for example, we fired cone 06, 04, 03, 02, 01, 1, 2). The data measured from each, including the temperature, will be entered for the specimen to which it pertains in the Insight-live recipe corresponding to the code number stamped on this bars. The 12cm dia. disk is being cut from 3/16" thickness. Notice how the clay tears as cut, this is an indication of low plasticity. The greenish color is typical of terra cotta clays.
In a ceramics lab, studio or classroom specimens of hundreds of glazes and bodies may be present. A code numbering system that links these to written or computer records is essential.