Expanding the Sheetfed Operation?More Than the Metal
An exhaust system will evacuate unwanted heat caused by infrared dryers. This will help protect the press and operator from intolerable temperatures, especially during warm weather.
Ammonia fumes must be evacuated from the press delivery system and surrounding area, not only for the operator's health, but also to remove the moisture-saturated air when drying water-based coatings.
The application of infrared drying leads to considerable improvement in the results obtained with sheetfed offset and web offset machines.
The selection of the most suitable drying method can be determined by the composition of the inks and coatings to be dried. Ink that does not contain water can be dried using an infrared drying system, while water-based inks and coatings are best dried using hot-air dryers.
Dispersion coatings are formulated with 40-percent film forming components and close to 60-percent water. Warm, dry air enhances evaporation of the water. A separate drying system for water-based coatings is the best tool for effective drying.