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

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Testsd-lab.2, d-lab.2plus, netlab.2plus: Operation5.3.4 Default Setting of Maximum Densities and Calibration FactorsBasic settings of maximum densities for Agfacolor Splendix and Agfacolor Sensatis Paper:Dmax red = 2.3Dmax green = 2.2Dmax blue = 2.05NoteMake sure to start from the basic settings for the used paper. If the wrong basicsettings are used, this may result in distinctive color fringes caused by blooming.Default settings for calibration factors:Calibr.fact. red = 1.03Calibr.fact. green = 1Calibr.fact. blue = 0.98The default settings are optimized for the use of AgfaPhoto Sensatis and Splendix papersand AgfaPhoto d-lab chemicals.Therefore we recommend to leave the values for Dmaxand the calibration factors unchanged.If papers and/or chemicals of other manufacturers are used, the settings can be changedto improve the calibration for these papers and/or chemicals and thus improve the qualityof the production (see Defining New Maximum Densities for a Paper and Change GrayBalance of the Internal Densitometer in this chapter).Learn in which cases the settings for maximum densities should be modified further downin this chapter (see When Should the Maximum Densities be Changed?).NoteThe specified maximum densities (Dmax) refer to the measuring results of the internalMinilab densitometer.The internal densitometer has filters deviating from status A.Therefore the values measured on an external densitometer will usually be differentfrom the results of the internal densitometer.5-14 2005-05-01 / PN 04092_01 AgfaPhoto
d-lab.2, d-lab.2plus, netlab.2plus: OperationTests5.3.5 When Should Maximum Densities Be Changed?An incorrect balance of maximum densities is mainly noticeable in BW pictures, in sceneswith large black areas, or in case of synthetic motifs. The following characteristics shouldbe optimized with the balance of the maximum densities:a) Neutral appearance of shadowsA neutral black balance in the shadows can be obtained if the maximum densities of thethree color channels show a neutral balance in the PBL field with the highest density. Thisbalance depends on the paper type in use, e.g. red shadows can be corrected– by increasing the Dmax red value,– or, if the red channel is already at the limit of the laser intensity, by decreasing theDmax green and Dmax blue values accordingly.b) Depth of shadowsGenerally speaking: the higher the maximum densities on the PBL print the more depth inthe shadows can be obtained.However, we do not suggest to enter maximum densities higher than 2.5, as this maycause irregularities in the color scale around highly saturated colors especially insynthetic motifs.c) Neutral appearance of fringes caused by blooming effectsFringes may appear in motifs with sharp edges and high density differences, e.g. thinwhite lines of white letters on black background (black leaks into the white letters).Especially the colored fringes look irritating. Therefore a neutral color should be adjustedfor the fringes.Generally these fringes can be reduced by reducing the maximum density. The coloredappearance of fringes can be adjusted by variations of the respective maximum density:5Whereby a reduction– of Dmax red results in less cyan,– of Dmax green results in less magenta,– and of Dmax blue results in less yellowin the fringes.The fringes react quite critically to the changes of the Dmax value, therefore do not usevalues for ∆red, ∆green, or ∆blue that are higher than 0.05.The adjustment of neutral fringes should be made with a suitable motif, i.e. thin whitelines or print on black background or a fine black and white crosshatch pattern.The variations of the maximum densities for the adjustment of the fringes always resultsin a compromise regarding the characteristics mentioned in item a) and b).AgfaPhoto 2005-05-01 / PN 04092_01 5-15
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d-lab.2, d-lab.2plus, netlab.2plus - D-Lab 1

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