Three-dimensional (3D) printing promises a revolution in laboratory creativity by enabling rapid prototyping, broader availability of scientific apparatuses, and transformative scientific workflows. We believe all chemistry and biology laboratories should equip themselves with one or more 3D printers and a critical mass of scientists trained to operate them. This overview surveys the techniques, intricacies, and pitfalls associated with 3D printing of functional parts, including measurements, computer-aided design, slicing, limitations of 3D printing, troubleshooting, tips for tricky filaments, and 3D printer maintenance. A flow cells are essential tools in chemistry and biology laboratories, we discuss techniques relevant to the construction of watertight 3D-printed parts. Finally, we articulate a set of principles required for reporting 3D-printed innovations to improve the field's reproducibility and encourage iterative improvements by other scientists. Ideally, authors, peer reviewers, and editors will adopt these principles. We hope these protocols inspire a new generation of publications applying 3D printing in chemistry and biology-especially highly reproducible inventions with the requisite detail and associated documentation. Such reports will facilitate broad adoption and creative iteration of the most innovative designs, thus accelerating discovery in chemistry and biology. © 2024 The Author(s). Current Protocols published by Wiley Periodicals LLC.
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