Effects of Press Speed on Flexographic Printing in Central Impression Presses: A State-of-the-Art Update with Emphasis on Inks

Abstract

Press speed is among the most consequential variables in flexographic printing, yet its effects in central impression (CI) presses are neither linear nor separable from ink behavior. This article is a state-of-the-art update: it presents no new experiments and defends no thesis. It triangulates two independent literature corpora compiled in September 2026: a 42-source technical corpus spanning peer-reviewed journals, TAGA proceedings, the FFTA Flexo Quality Consortium, trade and vendor publications, and patents; and a Consensus Deep Search synthesis of 100 included papers selected from 237 eligible records. The synthesis finds that speed acts through coupled mechanisms -- reduced nip dwell time, rate-dependent ink film splitting, temperature-driven viscosity and pH drift in water-based inks, drying-capacity limits, and web dynamics around the common impression drum. Higher speed often reduces ink transfer and optical density, but the response can be non-monotonic and is strongly mediated by formulation, anilox geometry, plate mechanics, and substrate. The update closes with agreements, disagreements, and a prioritized research agenda.