Svojstva aditivnosti i proporcionalnosti Beer-Lambertovog zakona pri reprodukciji ispisa na Ink Jet i elektrofotografskom pisaču

master's thesis

• Author: Aida Peštelić
• Mentor: Ante Poljičak (mentor)
• Committee member: Lidija Mandić (član povjerenstva)
• Committee member: Ante Poljičak (član povjerenstva)
• Committee member: Maja Strgar Kurečić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2016-9-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

U grafičkoj tehnologiji Beer-Lambertov zakon se svodi na ovisnost optičke gustoće promatranog otiska o koncentraciji pigmenata i debljine nanosa bojila. Sam zakon se može svesti na oblike teorijskih koncepata aditivnosti i proporcionalnosti. Međutim, ti teorijski koncepti pokazuju pogreške u praksi.

U ovom radu se ispituje kako određeni čimbenici utječu na veličinu pogreške proporcionalnosti i aditivnosti. Ti čimbenici su; redoslijed otiskivanja procesnih bojila i različite tehnike otiskivanja. Za te svrhe ispitivanja izrađena je testna karta s primarnim, sekundarnim i tercijarnim procesnim bojama u .eps formatu zapisa. Rastertonska vrijednost svake boje ima raspon od 10-100% pokrivenosti površine. Za tiskovnu podlogu je upotrijebljen standarni papir Navigator Universal 80 g/m2 formata A4 (210 x 297 mm), a za tehnike otiskivanja elektrofotografija (LaserJet Pro 4000 color) i Ink Jet (Epson Stylus Pro 3800). Praćene su krivulje reprodukcije ovisnosti aditivnosti i proporcionalnosti o rastertonskim vrijednostima. Najveće promjene su uočljive na Ink Jet pisaču, odnosno laser pisač je pokazao bolje rezultate na sve tri testne karte. U okviru pravila aditivnosti, najbolji redoslijed bojila se pokazao preporučeni (CMY). Vizualnom kontrolom potvrđeni su dobiveni rezultati.

Istraživanje daje cjelokupan pogled svojstva proporcionalnosti i aditivnosti u praksi. Samim time je zanimljiva tema za povećanje kvalitete određenog grafičkog proizvoda.

Abstract (english)

In the graphic technology Beer-Lambert's law is reduced to dependence of optical density on the concentration of pigments and dyes thickness. The law itself can be reduced to a form of theoretical concepts of additionality and proportionality. However, these theoretical concepts indicate errors in practice.

This paper examines how certain factors affect proportionality and additivity failure. These factors are; the order of printing process colors and different printing techniques. For the purposes of this thesis, test chart was made with the primary, secondary and tertiary process colors in .eps format. Screen value of each color has been defined with a range of 10-100% coverage. For printing surface standard paper Navigator Universal 80 g/m2 A4 (210 x 297 mm) was used, and for printing techniques electrophotography (LaserJet Pro 4000 color) and Ink Jet (Epson Stylus Pro 3800). Curves depending on additivity and proportionality have been observed. The largest changes are found in the Ink Jet printer, eg. laser printer showed better results on all three test cards. Within the rules of additivity, the best sequence of colors proved to be recommended (CMY). Visual inspection confirmed of the results has been obtained.

The study gives a full view of properties of proportionality and additivity in practice. Therefore it is an interesting topic for increasing the quality of a particular graphic product.

• Keywords: aditivnost; proporcionalnost; Beer-Lambertov zakon; elektrofotografija; Ink Jet
• Keywords (english): additivity; proportionality; Beer-Lambert's law; electrophotography; Ink Jet
• Language: croatian
• URN:NBN: urn:nbn:hr:216:730879
• Study programme: Title: Graphic technology; specializations in: Graphic technology, Design of graphic products; Course: Graphic technology; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije (sveučilišni/a magistar/magistra inženjer/inženjerka grafičke tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-04-18 21:27:28