The
Heavier Plate Investigation
Before -- The dish on the right was noticed to be strangely blotchy looking after a round in the dishwasher, and on closer inspection, was found to be covered in a network of little cracks. The dish was also felt (literally) to be subtlety heavier than a typical dish of the same design and manufacture, shown on the left. Although the original source of the damage to the dish was not identified, it was speculated that it had somehow become 'water-logged'. The weight of the good dish was measured and found to be about 183.6 g, while the damaged dish was found to be about 207.4 g, which is 23.8 g or about 13% heavier. (It is assumed the good dish is representative of the weight of any other good dish, and no attempt was made to find the variability among other good dishes.) In an effort to study any change in water content, the dishes were first measured over a day or two to see if they changed on there own. No change was measured, however it was noticed that the blotches on the damaged dish seemed to spread out, making the entire surface seem more homogeneously discoloured; although nothing left the dish, it was becoming evenly soaked. (Also, the dishes seemed fairly similar to the touch.) |
After -- The dishes were both placed in an oven and heated
and held at about 270° F. (Actually, the oven was set to 250°F, but the
thermocouple, in the photo, said otherwise; not that unexpected a result for
an oven really.) Initially it was
planned to place the dishes in the sun and wind, which should also have done
a good job, and been considerably gentler, but such a technique would be far
to slow for the project schedule to be met.
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