This degree theme work aims to evaluate the present ICC-profile and printing ink of Dalarnas Tidningar AB. The companyhas changed printing ink quality and wants to evaluate how the present ICC-profile work with the new printingink. Four different ICC-profiles were included in the comparison.One test printing was accomplished with two different separations. Two new ICC-profile was created, as a comparingmaterial. An densitometer was used to measure the technical parameters of the printing. IT8-charts and RGB-chartswas measured with spectrophotometer. La*b*-values, CMYK-values, graybalance curves, color deflections and colorgamuts was compared on screen and on the printed material.Materials from an earlier testprinting and evalution, made by Stora Enso Kvarnsveden AB 2003, was used to evaluatethe function of Dalarnas Tidningar AB´s ICC-profile with the present printing ink quality. The IT8-chart from todaystestprinting was oppened in a program for textediting to have access to La*b*- and CMYK values. The values from theearlier testprinting was supplied from Stora Enso Kvarnsveden AB.The result of this work shows that the ICC-profile from the company, compared with de other profiles, reproduce darkershadow regions which can make loss of details. An higher saturation is recieved in the red and yellow area while thegreen and blue area lose its intensity. The profile gave images which are some contrastless and with a flat reproduction.Today printing ink quality gives more saturation and intensity in the yellow and blue area compared with former printingink. The dark tone reproduces with decreased luminance, however.

The following degree project deals with the production of an ICC-profile, this in the form ofproducing ICC-profiles for VTAB Backa. The company previously had their own profile butthey weren’t satisfied, so earlier this year they started using the TU standard profile, but theyalso wanted a complement to this in form of a profile created for solely their printing press.The separation settings used when creating the new profiles were based on information fromTU and their profile. Two basic profiles were created and then edited to obtain a better result.The test printings made with the edited profiles showed that the less adjustments that are made,the better. It was also discovered that the TU standard profile eliminates the highlight toneswhiles the new profiles are somewhat darker. VTAB Backa has at the end of this degree projectdesided to conduct more test printings before making their decision.

Det här examensarbetet berör ämnet färgstyrning inom digitaltryck. Grundprincipen medfärgstyrning är att få hela den grafiska produktionskedjan att resultera i en förutsägbar och korrektslutprodukt. Den här styrningen sker i huvudsak med hjälp av ICC-profiler.Syftet med arbetet var att hjälpa företaget dpn att ta fram ett väl fungerande arbetsflöde för derastvå Kodak digitalpressar. Företaget ville dels få en så bra färgmatchning mellan de bådatryckpressarna som möjligt, och dels få en så bra matchning mot gällande standardvärden föroffsettryck som möjligt. Dessutom syftade arbetet till att utveckla min egen kunskap kring arbetetmed färgstyrning.Arbetet utfördes genom instudering av relevant teori i ämnet, vilken sedan applicerades på detpraktiska arbetet. Det praktiska arbetet bestod främst i att trycka testkartor som mättes upp och lågtill grund för skapande av ICC-profiler.Arbetet visade sig ge ett positivt resultat. Mätningar gjordes dels innan arbetet påbörjades för attkontrollera hur stor färgavvikelsen var vid det tillfället. Efter skapande och applicering av de nyaprofilerna visade sig färgavvikelsen ha minskat, både sinsemellan de båda tryckpressarna och motgällande standard. Avvikelsen hamnade under de målvärden företaget satt upp på förhand, menlämnade samtidigt utrymme för ytterligare förbättringar på sina ställen.SlutsatserRapporten visar att målsättningen att få de båda tryckpressarna på företaget att trycka med enfärgavvikelse under de på förhand uppsatta värdena kunde uppnås med god marginal. Vidarekonstaterades också att målet att få de båda tryckpressarna att simulera mot standardvärden föroffsettryck kunde uppnås, med undantag för några enstaka färgvärden. / Color management of Kodak Nexpress on Digital Printing NetworkThis thesis concerns the subject of color management in digital printing. The basic principle ofcolor management is to get the entire graphic production to result in a predictable and accurate endproduct. This control is mainly made by the use of ICC profiles.The purpose of this work was to help the company dpn to produce a well-functioning workflow fortheir two Kodak digital presses. The company wanted to get as good color matching between thetwo printing machines as possible, and get a good match with the existing standard values for offsetprinting as possible.The work was carried out by studying of relevant theory on the subject, which then was applied tothe practical work. The practical work consisted mainly of printing test charts, which was measuredand was the basis for the creation of the ICC profiles.The work proved to give a positive result. Measurements were made before the work began tocontrol how much color difference was at the time. After the creation and application of the newprofiles it was shown that color deviation have declined, both between the two printing presses andwith the current standard. Deviation fell below the targets the company had set up in advance, butdid allow for further improvements in their places.ConclusionsThe report shows that the objective of the two Kodak Nexpress to print with a color differenceunder the pre-determined values could be achieved with good margin. Moreover, it was found thatthe objective of the two Kodak Nexpress to simulate the default values for offset printing wasachieved, with the exception of a few color values.