It only takes her two seconds. But those two seconds are packed with details. To a typical potter, it might seem that this factory worker is doing the impossible. Although she is just dipping plates, there is so much going on here we need to stop and itemize it. There is more than one thing a potter can learn from this. Click/tap the URL below to see the video and learn more.
| URLs |
https://www.facebook.com/reel/1555758769633769
A factory worker dip-glazes translucent porcelain plates with her bare hands. Very fast! She works at incredible speed, glazing one every two seconds. Without using dipping tongs. She applies a very thin layer of transparent glaze. While it appears very watery (low viscosity), it is likely high-solids and deflocculated to achieve extreme thixotropic behavior (fluid when moving, gelled when still). The speed of the dip, and fluid sweep while below the surface, ensure that all parts of the plate spend the same fraction of a second submerged, ensuring a uniform layer. Notice also that the plates on the split foam belt dry enough to stack within 10-15 seconds. What about the spot on the rim where she is holding it? Upon pulling the plate out, the glaze is still fluid enough to pool over it as a product of the way she releases it. Notice also that she picks them up with a glove, which means they may be hot (to speed drying). Finally, additions of surfactants and defoamers break the surface tension, enabling air bubbles to pop and smooth over quickly before the glaze dries. One final detail deserves repeating: This is translucent porcelain, maybe even bone china. That means the ware has been bisqued to zero porosity. Wow! |
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