Devijacija kolorimetrijskih vrijednosti u ofsetnom tisku

Vučur, Krešimir (2009) Devijacija kolorimetrijskih vrijednosti u ofsetnom tisku. Diploma work - Pre-Bologna programme. Grafički fakultet. [Mentor: Zjakić, Igor].

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Abstract

Zahtjevi tržišta i sve veća konkurentnost na području grafičke proizvodnje sve više diktiraju brzi rok isporuke i što veću kvalitetu grafičkih proizvoda. Danas je ofsetna tehnika tiska najviše zastupljena u grafičkoj proizvodnji a sama tehnologija se toliko razvija da se grafički proizvod može dovesti do visokog stupnja kvalitete. U ovom diplomskom radu spominju se neke od metoda za određivanje kvalitete ofsetnog tiska koje su eksperimentalno ispitane na ofsetnim otiscima. Ispitivanje je obavljeno pomoću denzitometra i spektrofotometra na 10 uzoraka u nakladi od 5000 otisaka, pri čemu su rađena ispitivanja na svakom 500-tom otisku. Mjereni su 500-ti, 1000-ti, 1500-ti, 2000-ti, 2500-ti, 3000-ti, 3500-ti, 4000-ti, 4500-ti i 5000-ti otisak pri čemu su mjerene L*a*b* vrijednosti i gustoća obojenja boja cijana, magente, žute i crne na tri zone otiska. Iz dobivenih L*a*b* vrijednosti izračunavate su razlike boja (ΔE), a od dobivenih vrijednosti gustoće obojenja izračunata su odstupanja od srednjih vrijednosti. Standardne devijacije jednog mjerenja i standardne devijacije aritmetičke sredine izračunate su iz dobivenih rezultata i prikazane tablično. Iz izračunatih rezultata određena su odstupanja te kvaliteta ispitivanih otisaka a samim time i kvaliteta cijele naklade.

Item Type:	Diploma work - Pre-Bologna programme
Mentor name:	Zjakić, Igor
Defence date:	June 2009
Abstract in english:	Requirements of the market and the increasing competitiveness in the field of graphic production are increasingly dictating the quick delivery rate and the quality of the products. Today, the offset printing technique is the most represented in graphic production and with the technology continuously developing, the graphic product can be lead to a high level of quality. This thesis will mention some of the methods for determining the quality of offset printing, which were experimentally tested on offset print. The testing was carried out using a densitometer and spectrophotometer on 10 samples in the quantity of 5000 prints, where there were tests done on each 500 prints. The 500th, 1000th, 1500th, 2000th, 2500th, 3000th, 3500th, 4000th, 5000th prints were measured, of which the L*a*b* value and density of the shade of colours cyan, magenta, yellow and black were measured on three zones of print. From the obtained L*a*b* value, the colour difference (ΔE) was calculated, and from the received value of shade density, the deviation from the mean value was calculated. Standard deviation of one measurement and the standard deviation of the arithmetic mean were calculated from the obtained results and are displayed in a table. From the calculated results, the deviations and the quality of the tested samples were concluded, thus also the quality of the complete printing run.
Uncontrolled Keywords:	kolorimetrijske vrijednosti, standardne devijacije, gustoća obojenja
Keywords in english:	coloumetric value, standard deviation, shade density
Subjects:	TECHNICAL SCIENCES > Graphic Technology
Institution:	Grafički fakultet
City:	Zagreb
Number of Pages:	53
Callnumber:	zja 2009 vuč
Inventory number:	D709, D712
Status:	Unpublished
Date Deposited:	15 Nov 2013 21:34
Last Modified:	20 May 2014 12:06
URI:	http://eprints.grf.unizg.hr/id/eprint/658

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