15/10/2026
Before filtration, industrial fryers were judged by eye.
A person stood at the end of the line with a card showing three shades of chicken breast, and when the product drifted to the wrong shade, they dumped the oil and started the run again.
It meant the first piece a plant made never matched the last one.
Brian Pfau of Oberlin Filter Company picked that as the project he is proudest of. Oberlin has made exactly one product since 1964.
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