During an interview at Printing United, a consistent theme emerged: manufacturers increasingly focus on direct-to-object printing for three-dimensional products. While the print industry traditionally centered on flat substrates and paper-based workflows, real manufacturing requires decorating complex shapes and dimensional parts.
Direct-to-object printing eliminates labels and stickers by applying graphics directly onto products. This approach works with soft and rigid plastics, glass, metals, ceramics, and wood — reducing waste and simplifying supply chains.
Why printing on shapes is harder than printing on paper
Printing on three-dimensional products presents distinct challenges. Most parts feature curves, recesses, and inconsistent geometry affecting ink behavior. Solutions require engineering, automation, and precise part handling.
Pad printing and inkjet — different approaches to the same problem
Pad printing and inkjet offer different approaches to complex shapes. Pad printing, as an on-contact process, reaches into crevices and conforms to uneven surfaces. Inkjet, an off-contact process, jets droplets through air, enabling faster throughput and digital image control while requiring consistent drop placement and reliable adhesion.
Surface energy and pretreatment
Surface energy and pretreatment prove critical. Surface compatibility often presents the greatest obstacle, as identical-appearing materials behave differently with applied ink. Flame, plasma, corona, and pyrosil treatments modify surfaces to promote adhesion and image quality.
Robotics expand the print envelope
Robotics increasingly enable direct-to-object printing advancement. Robotic inkjet end-of-arm tooling moves the print system around parts rather than forcing parts through fixed machine envelopes, expanding the range of printable products.
UV inkjet drives production efficiency
UV inkjet drives production efficiency through instant LED curing, allowing parts to move directly to assembly without extensive post-processing, supporting higher line speeds and tighter downstream integration.