When turning leatherhard pottery you can sometimes see a faint ripple developing in the cut surface. Its cause is a result of the cutting tool alternating between bouncing and cutting over the day's surface. It can also appear during turning metal on a lathe and the engineering term for this rippling is chattering. Usually the effect is something to be avoided and holding the tool more firmly and cutting at a slower rate can eliminate it. However, if chattering is encouraged the overall bold texturing produced can offer interesting possibilities for novel glazing and colouring.
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