This article addresses slow ink drying issues on printing presses, framing it as a systematic process diagnosis problem rather than a simple heating deficiency. Slow drying triggers defects like set-off, smearing, and capped line speed, with root causes often lying in poor heat placement, insufficient dwell time, unoptimized airflow, or substrate thermal limits, not just inadequate power. Targeted infrared drying offers an effective retrofit solution to recover drying margin, while proper lamp matching and process tuning are key to stabilizing the drying window and preserving print quality.
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