GCM 110 Chapter Notes - Chapter 1-3: Offset Printing, Nyishi (Tribe), Digital Printing
8 Nov 2016
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Weboffset: speed page output light paper folding inline both sides inline printed. Rolls -> stacks/logs of folded product long makeready more makeready waste. Sheetfed: format variability substrate variability more spot colours coating more precision/better register multiple pass printing. Sheet -> sheet quick makeready less makeready waste. Greater press speed (up to 90,000 kph or 3000+ fpm) Faster make-ready due to automation and process improvement. Average headset make=ready time has decreased from 1:43 to under an hour. Average coldest make-ready time has decreased from1:15 to less than 45 minutes. Hybrid presses which combine heat set with cold set or heat set offset with ex or digital printing units. Web offset to compete more with sheetfed offset. Sometimes known as a business forms press. Rare con guration in weboffset, but common in exography. One or more printing units - each with plate, blanket and impression cylinder. Each printing unit prints one colour on one side of the web.
