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News Release from: KBA | Subject: Densitronic S densitometry colour control module
Edited by the Printingtalk Editorial
Team on 17 January 2007
Ink Start-Up Waste Cut By 80% With KBA
System
A new colour control module for KBA's Densitronic S densitometry and spectrophotometry system is claimed to reduce ink-related start-up waste by as much as 80 per cent.
A new colour control module for KBA's Densitronic S densitometry and spectrophotometry system is claimed to reduce ink-related start-up waste by as much as 80 per cent According to KBA, the module can also speed-up ink-key settings
This article was originally published on Printingtalk on 9 Feb 2004 at 8.00am (UK)
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With conventional control systems, the specified densities for each ink key and inking unit are set at different times.
Where image area coverage is 40 per cent to 100 per cent, ink density is stable after 80 to 120 sheets, so no acceleration is needed, said the company.
But where coverage is less than five per cent, the slowest ink key takes very much longer to run up to target.
KBA added that since every colour is normally of equal importance, the slowest ink key more or less dictates the quality of the image delivered.
With dynamic colour control, the low-coverage areas are initially over-inked, which cuts the time required to achieve the specified density.
Even with an area coverage of less than five per cent the target range can be reached in just 120 sheets, it is claimed.
The system can also be used to reduce inking.
But although it brings over-inked keys up to target faster, the effect is limited by the fact that ink keys cannot have a negative setting, so control algorithms must be set to ensure that new target values are based on the lowest inking level.
The image area coverage on which the dynamic controls are based is calculated using the CIP3 job files displayed in the Densitronic S monitor.
If a KBA Rapida press is networked with Logotronic Professional then area coverage data are subsequently transferred directly to the Densitronic S system.
The dynamic colour control module is said to be compatible with any Rapida sheetfed press embedded in a Densitronic S, or Densitronic Basic colour management system, so even older models can benefit from the enormous cost savings it delivers.
For Rapidas built during, or after 1995, the upgrade takes the form of a software plug-on for the Densitronic desk.
On new installations enabling is optional.
Dynamic colour control has been installed on all the Rapida presses at KBA's customer showroom in Radebeul (Germany) and can, therefore, be included as part of a press demonstration. Request a free brochure from KBA ...
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