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.

In the printing industry quality is key, this is because a product is printed for a better appearance or to convey information. If the packaging for a product looks bad customers will get a bad first impression of the product. The quality of the print can be affected by many different factors. The material properties of the paperboard such as stiffness, surface roughness, and thickness. It could also be affected by the coating of the paperboard, the properties of the ink, the material properties of the printing form, etc.  In this thesis, the effect of the contact time and the maximum pressure in the nip of a flexographic printing press was studied. To separate these variables six different desirable pressure pulses were decided upon. Three of them where the contact time remains constant while the maximum pressure changes, and three other pulses where the maximum pressure is constant while the contact time changes. The printing was done in an IGT F1 laboratory printing press. The different pressure pulses were achieved by using three different printing forms and varying the force settings in the printing press. The mottle results from the mottle analysis do not show a clear reliance on the contact time or maximum pressure. Instead, the stiffness of the printing forms influences the results to such an extent that it overshadows any effect that the contact time or maximum pressure has. In the case of dot gain, it can be determined that a larger impression leads to more dot gain. However here the stiffness of the printing plays a large role, and no clear conclusions can be drawn when strictly comparing contact time or maximum pressure. / Inom den grafiska industrin är kvalitet avgörande, detta eftersom en produkt trycks för att se bra ut eller för att förmedla ett budskap. Om förpackningen för en produkt ser dålig ut så får kunderna ett dåligt första intryck av produkten. Kvaliteten på trycket kan påverkas av många olika faktorer. Kartongens materialegenskaper såsom styvhet, ytjämnhet och tjocklek. Det kan också påverkas av kartongens beläggning, bläckets egenskaper, tryckplåtens materialegenskaper etcetera. I denna uppsats undersöktes effekten av kontakttiden och det maximala trycket i trycknypet i en flexografisk tryckpress. För att separera dessa variabler bestämdes sex olika önskvärda tryckpulser. Tre av dem var pulser med konstant kontakttid medan det maximala trycket justeras, och tre andra pulser där det maximala trycket hölls konstant medan kontakttiden justerades. Experimenten genomfördes i en IGT F1 laboratorietryckpress. De olika tryckpulserna uppnåddes genom att använda tre olika tryckplåtar och variera kraftinställningarna i tryckpressen. Analysen av provens flammighet visar inte ett tydligt beroende av kontakttiden eller maximalt tryck. Det är i stället tryckplåtarnas styvhet som påverkar resultaten mest, de påverkar resultaten i en sådan stor utsträckning att det inte går att dra några slutsatser om kontakttiden och det maximala tryckets påverkan på resultatet. Från resultaten av punktförstoring kan slutsatsen dras att högre intryckning ger mer punktförstoring. Men även i detta fall så spelar styvheten för tryckplåtarna väldigt stor roll och inga slutsatser kan dras för vare sig kontakttid eller maximalt tryck.