QuadTech partners with Alwan Color Expertise to automate dot gain compensation curves

Cooperation brings automated plate curve standardization and color control to web offset printers.

Sussex, Wisconsin, USA—10 April, 2012—Global press controls provider QuadTech and graphic software provider Alwan Color Expertise (Lyon, France) have joined forces to provide on-the-fly automated plate curve monitoring and adjustment for web offset press applications. Working with QuadTech's Color Control System with SpectralCam™, Alwan's PRINT Standardizer® software automatically compensates for dot gain deviations in virtually all printing situations and also provides ISO 12647 and G7® compliance confirmation.

QuadTech AccuCam system
Alwan PRINT Standardizer analyzes all
spectral measurements coming from
QuadTech's SpectralCam, and generates
Dynamic Press Calibration curves that will
be applied on the CTP device for the
subsequent jobs.

The software relies on measurement data provided by QuadTech's Color Control System with SpectralCam. The spectral data is converted to L*a*b* and densitometric values including dot gain or tonal value increase (TVI). Analysis by the Alwan software determines any dot gain variations and can automatically generate dot gain compensation curves, per job or over a specified time period. Alwan PRINT Standardizer monitors and stores data from any number of presses or papers per press. This information is easily retrieved, using parameters such as job, press, or paper name. The result is simpler, faster make-ready times, and greater stability from job to job. The combined solution is easily integrated into any existing workflow.

"Many factors can lead to dot gain variations on a press," according to Elie Khoury, president of Alwan. "These include paper, ink set, damping solution, room conditions (temperature and humidity), printed form content, and mechanical properties of the press. Maintaining constant control over dot gain is essential because increases of even three percent can result in color changes detectable to the human eye."

Any commercial printer can now achieve the same quality output from their web-fed as their sheet-fed press due to the collaboration of QuadTech and Alwan technology. Without the Alwan and QuadTech combined solution, dot gain shows a lot of deviation and is very unpredictable. With the new automated in-line measurement and standardizing technology, web printers can achieve print consistency and dramatically decrease make-ready time.

Greg Wuenstel, QuadTech product manager, comments: "Because of the diversity of substrates, not to mention the many factors that can cause deviation, monitoring and optimizing dot gain compensation curves has traditionally been a labor intensive task. Alwan's PRINT Standardizer software, together with QuadTech's color control technology, provides a fast, reliable means of ensuring consistent, ISO-compliant quality in web-offset, in virtually any printing situation."

About Alwan Color Expertise

Alwan logo

Alwan Color Expertise (www.alwancolor.com) was founded in Lyon-France in 1997 by the current President Elie Khoury. His vision—to demonstrate how important standardizing and controlling color is throughout every stage of production—has resulted in the company becoming a world leader in standardization and color management. Today, Alwan Color Expertise offers a choice of full-featured Color Management and Standardization software solutions to key players throughout the graphic arts industry, from printers to publishers and from software developers to hardware manufacturers. The unique benefit of Alwan technologies is that they enable conventional processes such as offset, flexography and gravure, and digital machines such as digital printers and large format presses to produce consistent and predictable colors.

About BALDWIN | Vision Systems (formerly QuadTech)

BALDWIN’s Vision Systems division is the world’s leading innovator of advanced color and inspection technology for the printing industry. BALDWIN | Vision Systems sells its automated control systems in more than 100 countries to the packaging and converting markets, web offset newspaper and commercial markets, and publication gravure market. BALDWIN maintains a worldwide network of sales and service operations, and is privately owned by BW Forsyth Partner, the investment arm of multi-billion dollar global manufacturing and engineering consulting firm Barry-Wehmiller.


Craig Du Mez, BALDWIN | Vision Systems
Phone: +1 414 566 7500
Email: craig.dumez@quadtechworld.com

Clare Porter, Bespoke
Phone: +44 (0) 1737 215200
Email: quadtech@bespoke.co.uk