Ronneberger, SebastianSebastianRonnebergerZhang, JunfangJunfangZhangLiu, YuxinYuxinLiuLoeffler, Felix F.Felix F.Loeffler2025-11-262025-11-262023-04-25Advanced Functional Materials 33 (17): 2210116 (2023)https://hdl.handle.net/11420/59161Tagging, tracking, or validation of products are often facilitated by inkjet-printed optical information labels. However, this requires thorough substrate pretreatment, ink optimization, and often lacks in printing precision/resolution. Herein, a printing method based on laser-driven deposition of solid polymer ink that allows for printing on various substrates without pretreatment is demonstrated. Since the deposition process has a precision of <1 µm, it can introduce the concept of sub-positions with overlapping spots. This enables high-resolution fluorescent labels with comparable spot-to-spot distance of down to 15 µm (444,444 spots cm⁻²) and rapid machine learning-supported readout based on low-resolution fluorescence imaging. Furthermore, the defined thickness of the printed polymer ink spots can be used to fabricate multi-channel information labels. Additional information can be stored in different fluorescence channels or in a hidden topography channel of the label that is independent of the fluorescence.de1616-3028202317inkjet printinglaser-induced forward transfermachine learningsolvent-free polymer patterningTechnology::600: TechnologyJournal Article10.1002/adfm.202210116Journal Article