d-lab.2, d-lab.2plus, netlab.2plus - D-Lab 1

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Testsd-lab.2, d-lab.2plus, netlab.2plus: Operation5.2 Printer Tests:Paper Balance Test (PBL) and Master Balance Test (MBL)Prior to production start the machine must be calibrated. Only if Printer and PaperProcessor are perfectly calibrated good prints will come out.The purpose of the Printer calibration is to adapt the individual elements of the Printer –print engine, paper and paper processing with respect to each other.Test prints are exposed for the calibration; these test prints show a 13-step grayscale(ranging from minimum to maximum density). The densities of the individual steps aremeasured with the densitometer integrated in the Minilab. The Printer prints test printswith updated, newly adapted Printer settings until the grayscale comes out neutral.We differentiate two types of Printer calibrations:– The Paper Balance test (PBL) refers to a paper configuration. For this paperconfiguration the Printer is to be adjusted for a neutral print of the grayscale. Thedetermined calibration data is saved and loaded whenever this paper configuration isused.Furthermore this test is used to adjust the maximum intensity of the laser for the threecolor channels (red, green, blue); (for further information: see PBL Test with Laser Pointin this chapter).– The Master Balance test (MBL) refers to all paper configurations. The MBL is printed onthe so-called master paper. This is the paper that is used most frequently in the lab.And the Printer must be adjusted to print a neutral grayscale with this paperconfiguration. However, the determined calibration data in this case will be used for allpaper configurations.The purpose of the MBL is to compensate for system fluctuations (in chemicals,Printer, etc.).Based on the changes, which were determined on the master paper between the lastand the current MBL, all other paper configurations (PBL data) are adapted. So, anychange in the MBL influences all paper configurations.Therefore the MBL offers a possibility to use only one test to compensate for thesystem fluctuations for all paper configurations.(How to define the master paper see Printer Settings in Chapter 4.)NoteAll paper configurations, which are used for production, must be calibrated with a PBLtest.A PBL must only be printed after a valid MBL!A paper configuration is defined by width and surface of a paper (see Defining andEditing Paper Configurations in Chapter 4).5-2 2005-05-01 / PN 04092_01 AgfaPhoto
d-lab.2, d-lab.2plus, netlab.2plus: OperationTestsNoteIf the Minilab is used for the printing of high-quality professional work, the machinemay be switched to the professional mode. In this mode the tolerances for a successfulPBL/MBL are closer. These are the tolerances referring to color spread and the visualdensities of the individual steps of the grayscale (with the exception of minimum andmaximum densities).But switching to professional mode also entails longer calibration times as it needsmore cycles (test prints) to reach values which are in tolerance.Only the AgfaPhoto Technician can switch to this mode.55.2.1 Conditions for Printing an MBL and PBL– The last order must have been terminated.– No paper is permitted in the paper drive of the Printer and Paper Processor.– There must be enough paper in the magazine for the two tests (approx. 3 m).– The chemical solutions must be on nominal temperature.AgfaPhoto 2005-05-01 / PN 04092_01 5-3
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d-lab.2, d-lab.2plus, netlab.2plus - D-Lab 1

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