ELPRINT spectraCon is the worldwide first inline measurement system for simultaneous spectral color- and color density measurement over the whole web width with measurement rates up to some hundred per second. Due to this fact it is not only possible to completely scan each color control stripe with every rotation but also to scan the entire subject in web running direction for its spectral information. The spatial resolutions of this system is <1mm. High power LED illumination for line scan illumination grants nearly unlimited durability. With the use of 2D multi-spectral-photometers (comparable with >1000 ordinary spectral photometers) and a spectral resolution of <1nm in combination with 12bit CCD measurement cameras (optionally 16bit), the system provides precise and absolute color- and color density values. Closed Loop density control is also possible for special applications.
Color density in real time - The inline color density measurement enables the printer to recognize quality deviations very fast and to correct them immediately. A conventional hand operated densitometric measurement is not necessary any more. Saving of time and wastepaper are the positive result. Color constancy is achieved by prompt analysis of the measurements and the opportunity of a fast reaction of the printer to make adjustment modifications. As a result, the print quality is improved considerably.