Printing plates progress
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As digital printing keeps up its steady march across the graphics landscape, it’s easy to forget about progress in conventional printing, writes Laurel Brunner.
In addition to improvements in makeready times and energy efficiency on press, great strides have been made with consumables, especially printing plate technologies. Most attention gets paid to processless plates such as Agfa’s Azura, Fujifilm’s ProT and Kodak Sonora. But these are not the only technologies to have helped drive down environmental impacts.
The bulk of the printing industry still uses processed plates, and here too technology advances have been considerable. Ten years ago thermal plates had to be handled under special lighting and were good for around 150,000 to 200,000 impressions.
They generally had to be baked for longer runs, but baked plates would last for well over a million impressions. Imaging performance was around 200 lpi with resolution at 1-99% and platesetter imaging times were far slower than today’s rate of 70 plates per hour for 8-up plates.
Today thermal plates are daylight safe and platesetters are available that can output 4,000 dpi for high quality applications. And the aluminium used for printing plates can be recycled, generating revenue for printers, saving resources and primary raw materials extraction.
The story keeps improving despite declines in conventional print volumes and the advance of processless plates and digital printing methods. Agfa for instance has introduced the Arkana smart plate processing technology, which only uses small amounts of chemistry to clean the plates, and has a bath life of 15,000m2. The unit can be rinsed out with tap water, so waste and maintenance overheads are reduced.
When processing the Agfa Energy Elite Eco plate, for instance, waste is reduced by 50% compared to other processors and there is no hazardous waste water to dispose of. The secret to these advances and others like them is in the coating technology.
The Energy Elite Eco thermal plate has a dual coating solid enough to print long runs, yet sensitive enough for high quality imaging at 340 lpi and a 1-99% dot resolution. The plate requires no pre- or post-baking and is good for commercial and packaging runs of up to 600,000.
For UV applications it’s good for 150,000 impressions. And the plate has reduced dampening requirements. Across the industry technological develops like this are all helping to cut the environmental impact of print, making both the medium and the business more sustainable.
Source: This article was produced by the Verdigris project, an industry initiative intended to raise awareness of print’s positive environmental impact. This commentary helps printing companies keep up to date with environmental standards, and how environmentally friendly business management can help improve their bottom lines. Verdigris is supported by the following companies: Agfa Graphics, Spindrift.click, EFI, FESPA, HP, Kodak, Kornit Digital, Ricoh, Splash PR, Unity Publishing and Xeikon.
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