Agfa Introduces Screened Proofs For Newspaper Applications
Press release from the issuing company
IFRA, Geneva, Switzerland – 15 October 2001 – Agfa introduces Agfa Balanced Screening (ABS) for newspaper proofing to generate screened colour proofs with the Agfa Sherpa 6-color inkjet system. The dots used in newspaper printing are simulated on inkjet proof using ABS 85 or 100 lpi (lines per inch). In addition to more accurately representing the screened quality of newspaper printing, ABS makes it possible to predict scan as well as subject moiré. With the ABS option, Agfa gives users the flexibility of choosing between error–diffused screening and ABS technology. They can switch from one to the other depending on the specific need.
The Agfa Sherpa digital proofing system using Agfa’s error-diffused screening technique and colour-management software reproduces accurate contract colour proofs. These digital proofs have a smooth, continuous-tone quality; they do not show the coarse image texture that results from screens used for newspaper printing. Agfa Balanced Screening makes this possible. It allows newspaper printers and advertising departments to reproduce proofs that more accurately represent the look of the final printed newspaper.
Error-diffused screening technology can show moiré that has been recorded during the scanning process. It cannot, however, show moiré that is the result of interference between subject detail and the screen frequency (subject moiré). Agfa Balanced screening allows to predict both scan and subject moiré.
Agfa’s ABS screening process offers another advantage. Because the file is screened in the Apogee PDF Proofer RIP, which uses the same digital interpreter as the Apogee PDF RIP that images the final plate, the digital integrity of the file is preserved. The Apogee PDF Proofer RIP processes the document identically to the way it will be processed for platesetting. What is shown on the proof simulates more closely what will be imaged to the plate.
"ABS is a realisation of Agfa’s commitment to provide newspapers with the tools for accurate contract proofing, allowing them to attract more advertisers, thus increasing revenue," said Willy Van Dromme, worldwide director of marketing for Agfa’s proofing systems.
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