The clay was wedged thoroughly, rolled to 3/8 thickness (using the metal rods as gauges) and cut to 12cm long by 2.5cm wide bars. Code numbers and specimen numbers were 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. The data measured from each, including the temperature, will be entered for the specimen to which it pertains. The 12cm disk is being cut from 1/8" thickness. Notice how the clay tears as cut, this is an indication of low plasticity.
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.