The connection between fluorescence and color management still is a relatively unexplored area. Thefollowing composition analyses the theory that when printing on fluorescent ink jet paper using ICCprofilesa more yellow print will appear. In theory the ICC-profile compensate for blue light that fluorescefrom the paper with the complementary color, yellow. The human eye apprehands this fluorescentlight as white.When categorizing a number of ink jet qualities some tests to indicate change of color in the final printwere made. Five qualities were chosen for further analyses, each with different white point. TheTC3.5CMYK target was prined on an ink jet printer and measured with different filters for the measurementequipment, GretagMacbeth Spectrolino. U- and UV-filters were used during the testings.From the measurement data ICC-profiles were made to make it possible to watch how the profiles compensatefor the blue change of color that appeared in the data. Although a distinct change of color intoblue were discernible in the measured data there is no evident proof that this cause a final print thatis more yellow. Other conclusions and results are to be read at the end of this composition.

To make your company change from a conventional workflow to an ICC-based workflow you need tomake investments in time and money. On the other hand you get your reward in terms of a stable andquality safe production. To choose this way of adjusting your company to new routines requires accuracyas well as a great deal of commitment. It is not only about having the right equipment. There area lot of factors that affect the quality of production.Our ambition with this report is to bring out the importance of general thinking when it comes toICC-profiling and to discuss on which basis printing profiles should be created. Quality parameters asfor example roughness and whiteness of paper are also discussed. To be able to investigate these mattersin detail we have taken a closer look at two companies, which have chosen to commit themselvesto achive better quality through color management but still feel that they have some problems withtheir workflow.One of the conclusions that are made in this report is that both companies should extend their investmentsin education of employees to become less independent of consultants, but also to increase theinterest in changes within the company. It is also stressed that an ICC-profile only can be efficient if acompany commits itself to accuracy regarding routines, control and calibration.

Det nystartade digitaltryckeriet Digaloo planerar att inom en snar framtid införa ICC-hantering i sittarbetsflöde. Med anledning av detta har en studie utförts där antalet erfordrade ICC-profiler undersöktssamt vilka akromatiska inställningar som bäst lämpar sig för tryckeriets HP Indigo Press 1000.Testtryckning utfördes på sex av Digaloos mest använda papperskvaliteter. Genom inläsning av testkartorhar de olika papperskvaliteternas reproducerbara färgrymder åskådliggjorts. Grundat på resultatetfrån denna testtryckning framställdes ICC-profiler för valda papperskvaliteter. Dessa genereradesmed olika inställningar för akromatisk repro och TIC (Total Ink Coverage). Vid en andra testtryckninganvändes dessa ICC-profiler för konvertering av mellanton-, natt- och snöbilder, vilka trycktespå olika papperskvaliteter.Resultatet från den första testtryckningen visar att HP Indigo Press 1000 återger störst förgrymd påpapperskvaliteten Silverblade Silk, tätt följd av Silverblade Art. De minsta färgrymderna reproduceraspå Lessebo Linné Gultonat och Lessebo Linné Naturvit.Vid perceptuell bedömning av de olika bilderna blev resultatet att bäst tryckresultat uppnås medpappersspecifika ICC-profiler. Detta gäller dock endast i två av tre fall. Vid bedömning av bäst lämpadTIC ansågs den idag på Digaloo använda nivån som mycket dålig. Genom att antingen sänka eller höjadenna nivå bedömdes tryckresultatet öka i kvalitet.Slutligen visar studien även att akromatik i form av UCR ger bäst bildåtergivning i mellanton- ochnattbilder på de valda papperskvaliteterna. De olika graderna av GCR i snöbilder anses dock passaolika bra beroende på vilken papperskvalitet som används.

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.