Have you ever spilled coffee onto a table? If so, you have probably noticed that the resulting stain is not nicely uniform but has a notable ring around it. This forgettable oddity is daily business in the printing industry, where such a drying pattern is detrimental to the final quality. Mechanical engineer Ruben van Gaalen investigated this problem by focusing on a promising solution: the use of surfactant molecules.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/3H2TqSG
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