Keys that "turn" themselves
Q: Is there an automated way to read ink dots and automatically adjust the ink keys?
A: Most prepress RIPs can create a PPF (Print Production Format) file, commonly referred to as a “CIP3 file.” This file, based on the same data used to generate proofs and plates, generates ink-key presets for a press with remote ink control capability. The PPF file must be interpreted by an intermediate application before being sent to the press for presetting the ink keys. The application analyzes ink coverage by color and by ink zone and delivers this information to the press, which in turn calculates the physical ink key openings and automatically applies them to all printing units of the press.
Heidelberg’s software for PPF interpretation is Prinect Prepress Interface. Prinect prepress RIPs that can produce a PPF for ink-key presets through Prepress Interface are the Delta RIP with CIP3 option (the previous-generation Heidelberg RIP) and Prinect MetaDimension with CIP4 option (the current Heidelberg RIP). Any Heidelberg Speedmaster or Printmaster press with remote ink control can use the PPF for automatic presetting of the ink keys. Depending on the press, this information can be delivered online over the production network or offline via job memory card.Note: this tip comes from the “Ask The Experts” Section of Printers Advantage, an online resource from Heidelberg. For more, please visit www.printersadvantage.com.