Advance Details of the Toyo Ink Exhibit
May 13, 2008—Designed to be used on thin paper, Toyo Ink’s “FD LED Series” of LED-UV curable offset inks consists of a range of offset inks hard dried using ultraviolet rays produced by dedicated light emitting diodes (LEDs). Although the “FD LED Series” achieves the same level of ink performance as UV curable inks dried using conventional UV lamps, it is lined up as a next-generation technology due to the fact that it reduces environmental impact by conserving energy. It is aimed squarely at users focused on printing innovation.
First and foremost, UV curable offset inks are regarded as a particularly environmentally friendly printing system compared to conventional oxidative polymerization drying offset inks.
They are characterized primarily by the fact that they do not include VOC (volatile organic compounds). Regular ink involves dissolving solids or high-viscosity resin in organic solvents, which are then released through volatile evaporation during printing. This gives rise to various issues that need to be addressed, including operational safety during the printing process and health hazards from residual solvents on printed matter. UV curable inks on the other hand use low-molecular organic compounds that produce photo-polymerization reactions under ultraviolet light as solvents, all of which are cured through polymerization during the printing and drying process, eliminating volatile evaporation of solvents.
Another key characteristic is instant drying. The rapid drying of regular inks involves heating with a hot-air dryer to speed up solvent evaporation, producing CO2 emissions from the electricity or gas used to heat the air. Although UV curing produces CO2 as a result of the usage of UV lamps, the amount of CO2 is greatly reduced.
The “FD LED Series” of LED-UV curable offset inks on display at this year’s drupa2008 make UV printing even more environmentally friendly. They are also compatible with offset printers fitted with industrial LED-UV curing systems. The main benefits of LED-UV curing systems are as follows.