Three-dimensional (3D) hydrogel printing enables production of volumetric architectures containing desired structures using programmed automation processes. Our study reports a unique method of resolution enhancement purely relying on post-printing treatment of hydrogel constructs. By immersing a 3D-printed patterned hydrogel consisting of a hydrophilic polyionic polymer network in a solution of polyions of the opposite net charge, shrinking can rapidly occur resulting in various degrees of reduced dimensions comparing to the original pattern. This phenomenon, caused by complex coacervation and water expulsion, enables us to reduce linear dimensions of printed constructs while maintaining cytocompatible conditions in a cell type-dependent manner. We anticipate our shrinking printing technology to find widespread applications in promoting the current 3D printing capacities for generating higher-resolution hydrogel-based structures without necessarily having to involve complex hardware upgrades or other printing parameter alterations.

Digital light processing (DLP)‐based bioprinting technology has recently aroused considerable concerns as a strategy to deliver biomedical materials and/or specific cells to create sophisticated structures for various tissue modeling and regeneration. In this review, we display a concise introduction of DLP bioprinting, and a further discussion on the design and manufacture of DLP (bio)printer with varied bioinks and their biomedical applications toward drug screening, disease modeling, tissue repair, and regenerative medicine. Finally, the advantages, challenges, and perspectives of the DLP printing platforms are detailed. It is believed that DLP bioprinting will play a decisive role in the field of tissue model and regenerative medicine, mainly due to its time‐efficient, higher resolution, and amenability to automation for various tissue needs.