Wait for it: as paint drops dry, they can look like a “fried egg” (left) or develop a more even pigment distribution (right). (Courtesy: Adapted from Langmuir 2023, DOI: 10.1021/acs.langmuir.3c01605.)
If you have ever literally watched paint dry then you might have seen a drying drop of paint look so
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Michael Banks
is news editor of Physics World magazine