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HOW CLEAN DO YOU WANT TO GET IT?
The most difficult question to answer is “how clean do you want the substrate to be.” For one application, “as clean as possible” may mean removing particulate matter no smaller than 10 mills (250 microns). In another
application, this particle size may represent a boulder. For reference, a 40 to 50 micron (2 mills) particle is at the lower end of the visible scale.
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