Web presses are convenient for high-speed commercial printing. They don’t use stacks of paper like sheet-fed printers. Web presses are ideal for high volume publications such as newspapers and magazines. They are of two types.
Heatset Web Presses
These have more components such as ovens and chill rollers at the delivery end. The ovens have intense heat which dries the ink on the paper as it runs through the press. Quick drying of the ink helps avoid mottling hence it produces remarkable work. The paper then moves on to the chill rollers to help the ink cool down and solidify. High quality coated paper such as those used for magazines are ideal for a heat-set press. The heat-set process produces high-quality images that are sharp and crisp on this paper.
Heatset web presses use oil-based inks which is why they need heat to evaporate excess solvents. The necessary components remain and set. Heatset presses also have a silicone applicator to help avoid smearing the ink.
Non-Heatset Web Presses
They don’t have an oven or a chill roller in the press which means the ink dries more by absorption or evaporation. Non-heat-set presses use water based inks which will get absorbed into the paper. The excess solvent evaporates on its own into the air. Thus, a nonheat-set press is ideal for printing on cheap uncoated paper. To avoid this they print with course line-rulings.
Many web presses come fitted with finishing equipment such as line folders making the final print ready for binding. A flying paster is also essential when working with a web press. It helps paster a new roll of printing paper so that the press doesn’t have to keep stopping.
Web presses have improved over the years. Its quality is now comparable to that of sheetfed printers. They produce high-quality four-colour (or more) printed work. They are the best solutions for long press runs as they are cheap.