True or False: It is important to ensure there is a drain hole at the bottom of a hollow part when printing on an SLA machine based on its orientation.

Ensuring there is a drain hole at the bottom of a hollow part when printing on a Stereolithography (SLA) machine is indeed important. During the printing process, resin accumulates inside the hollow sections of the part. If a part is completely sealed without any openings, the liquid resin cannot escape, which can lead to issues such as trapped air, incomplete curing, or even warping during the post-curing process.

A drain hole allows any trapped resin to evacuate, minimizing the risk of problems and ensuring better print quality. Additionally, it aids in the overall cleanup process, making it easier to remove any residual resin from the hollow structure before the final curing and finishing steps. Proper orientation and design that includes a drain hole can significantly enhance the reliability and success of SLA prints.