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  1. […]  In September 2015, we released our new quality testing file: Testman. We first did a few trials to find the best extrusion temperature for each filament. We printed two Testmans and one “owl” (.stl file from Thingiverse) under the best conditions for each filament. Then three people were asked to rank each batch from “best looking” to “worse looking”, and also group them by quality categories, along the list of criteria described here. […]

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