Utjecaj postavki flekso jedinice i rastriranja na kvalitetu magentne kolorne separacije

master's thesis

• Author: Gabriel Žilić
• Mentor: Igor Majnarić (mentor)
• Committee member: Mile Matijević (predsjednik povjerenstva)
• Committee member: Igor Majnarić (član povjerenstva)
• Committee member: Krešimir Dragčević (član povjerenstva)
• Granter: University of Zagreb; Faculty of Graphic Arts; Zagreb
• Defense date and country: 2022-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Graphic Technology

Abstract

Za potrebe proizvodnje fleksibilne ambalaže presudnu ulogu ima tehnologija fleksografskog tiska.
Osim odabira tiskarske podloge presudnu ulogu na kvalitetu reprodukcije utječu linijatura klišeja,
volumen čašice aniloks valjka i primjenjena traka (ljepilo) za fiksiranje klišeja. U ovom radu cilj
je istražiti utjecaj različitog volumena čašica aniloks valjaka (od 3.8 cm3/m2, 5.5 cm3/m2, 7.7
cm3/m2, 10 cm3/m2 i 11.6 cm3/m2) u odnosu na nove NX rastere proizvođača Kodak (STD_NX,
ADV_01, ADV_02 i ADV_03). Također će biti obrađen utjecaj tvrdoće različitih ljepila za klišeje
čija tvrdoća može varirati od mekoga, srednjega do tvrdoga (Tesa Softprint Soft, Tesa Softprint
Medium i Tesa Softprint Hard). Korišteni NX klišeji izrađeni su na Kodak flexcel large CtP
uređaju i otisnuti sa strojem WGH VISTAFLEX CL8 sa brzinom otiskivanja od 300 m/min. Kao
potrošni materijal koristila se 60 μm polietilenska tiskovna podloga niske gustoće te magentna
solventna boja. Dobiveni otisci mjereni su denzitometrom i spektrofotometrom TECHKON
SpectroDens pomoću kojega su dobivene krivulje reprodukcije (RTV org./RTV otiska) te su
izvršene usporedbe sa tiskarskim standardom FOGRA 39. Za detaljnu analizu izmjerenih uzoraka
izvršiti će se mikroskopska analiza karakterističnih polja za što će se primjeniti AM4117MZT
Dino-Lite Edge digitalni mikroskop.
Rezultati ovog istraživanja daju smjernice kada i kako odabrati odgovarajuću traku za montiranje
klišeja u kombinacijama s određenim tipom Kodak Flexcel NX rastera i odgovarajućom
linijaturom aniloks valjka. Rezultati pokazuju da otisci ostvareni sa aniloks valjkom volumena
čašice od 3.8 cm3/m2 u kombinaciji sa mekom trakom za montiranje klišeja i Kodak ADV_01 NX
rasterom daje najmanji rastertonski prirast u području od 1 do 100% obojenja i samim time najbolji
otisak koji je najbliži FOGRA 39 standardu.

Abstract (english)

Flexographic printing technology plays a crucial role in the production of flexible packaging. In
addition to the selection of the printing substrate, the quality of reproduction is influenced by the
printing plate line, the volume of the anilox roller cup and the applied selfadhesive tape (glue) for
fixing the printing plate. In this paper, the aim is to investigate the influence of different volumes
of anilox roller cups (from 3.8 cm3/m2, 5.5 cm3/m2, 7.7 cm3/m2, 10 cm3/m2 and 11.6 cm3/m2) in
relation to the new NX rasters produced by Kodak (STD_NX, ADV_01, ADV_02 and ADV_03).
The influence of the hardness of different printing plate adhesives whose hardness can vary from
soft, medium to hard (Tesa Softprint Soft, Tesa Softprint Medium and Tesa Softprint Hard) will
also be discussed. The NX plates used were made on a Kodak flexcel large CtP device and printed
with a WGH VISTAFLEX CL8 machine with a printing speed of 300 m/min. 60 μm low-density
polyethylene printing base and magenta solvent ink were used as consumables. The prints obtained
were measured with a densitometer and a TECHKON SpectroDens spectrophotometer, with which
reproduction curves (RTV org./RTV ot) were obtained and compared with the FOGRA 39
standard. For a detailed analysis of the measured samples, a microscopic analysis of the
characteristic fields will be performed, for which the AM4117MZT Dino-Lite Edge digital
microscope will be used.
The results of this research provide guidance on when and how to choose the appropriate cliché
mounting tape in combination with a certain type of Kodak Flexcel NX screen and the appropriate
anilox roller line. The results show that the prints made with an anilox roller with a cup volume of
3.8 cm3/m2 in combination with a soft cliché mounting tape and Kodak ADV_01 NX raster gives
the smallest rasterton increment in the area of 1 to 100% coloring and the best print that is closest
to the FOGRA 39 standard .

• Keywords: fleksotisak; aniloks valjak; trake za montiranje klišeja; Kodak Flexcel NX raster
• Keywords (english): flexo; anilox roller; adhesive film for printing plate mounting; Kodak Flexcel NX raster
• Language: croatian
• URN:NBN: urn:nbn:hr:216:115331
• 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: Open access
• Created on: 2024-06-18 08:12:10