As detailed in Screen Printing Magazine’s article, “T-shirts to Medical Trays: An Intro to IR Conveyor Dryers,” the ink-curing process is critical in screen printing. The curing process involves heating ink to specific temperatures (e.g., 320-340°F for plastisol inks) to ensure proper bonding, achieved as printed items pass through a conveyor dryer.
When choosing between gas and infrared (IR) conveyor dryers, understanding their unique capabilities is essential. Gas dryers use convection heat, providing consistent temperatures ideal for large-scale operations. They are more expensive and take up more space due to insulation and safety systems but can process various inks, including water-based and specialty inks.
In contrast, IR dryers use infrared radiation to heat ink molecules directly, reaching curing temperatures faster and requiring less space. They are more economical and efficient, especially for plastisol inks. However, improper usage can lead to ink overheating and breakdown.
For operations looking to process high volumes, IR dryers are capable of curing up to 1,000 items per hour, with scalability options like additional heating chambers or extended conveyors. Gas dryers, while robust, are best suited for larger print shops with access to affordable gas utilities.
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Article with all rights reserved, courtesy of ScreenPrintingMag.com.