Resin flow must not be inhibited during the DLP and cDLM printing processes. Unvented and watertight volumes require special considerations.
A small drain/vent hole should be used to enable reliable and accurate printing.
Vent holes should be around 1.0 mm in diameter. Slightly smaller holes are possible, depending on the material, printer, and geometry.
Drain/vent holes larger than 1.0 mm may be used and sealed with a printed plug after post-processing.