Glass objects when they come out a hot dishwasher cycle – for instance – when they’re at their smoothest and cleanest tend to have surprising amounts of fiction in the hand. Almost as much as coarse rubber. Why is this?
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Glass has very high friction. Different materials have different coefficients of friction, and glass is quite high.
Friction doesn’t come from dirtiness, and while a rough surface *can* increase friction, it can also decrease it. Some materials have stronger stickiness than others, and glass’ is pretty high.
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