The influence of the accelerated ageing on the black screen element of the Electroink prints

Majnarić, Igor; Bolanča, Zdenka; Mirković, Ivana Bolanča

doi:10.1088/1742-6596/231/1/012018

Cited by 4 publications

(5 citation statements)

References 5 publications

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Section: Resultsmentioning

confidence: 99%

“…In many growth models of colorimetric difference over time t, ∆E 00 (t) is expressed as a parametric function of coefficient τ and the positive proportional coefficient, ∆E 00f (where ∆E 00f is an asymptotic value). 16,21 This expression assumes that ageing is predominately determined by the amount of electromagnetic radiation that falls on the substrate and thus can be derived by the Beer-Lambert law.…”

Section: Resultsmentioning

confidence: 99%

“…Such a method is used for all printing inks, whether they are applied by conventional or digital printing techniques. 15,16 2 | EXPERIMENTAL Compared with a classic toner, prints made with high chroma (HC) toners result in higher reproduction quality, and of a greater colour gamut. However, can we claim that the printed colours provide sustainability lasting 10 years?…”

Section: Toners For Ep Printingmentioning

confidence: 99%

“…Using a Xenon test (UV light) it is possible to simulate the effects of sunlight and to perform accelerated ageing of printed ink. Such a method is used for all printing inks, whether they are applied by conventional or digital printing techniques …”

Section: Introductionmentioning

confidence: 99%

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Light stability in cyan and magenta tones using standard and highly chromatic toner particles

Majnarić

Morić

Modrić

2019

Coloration Technology

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An increasing requisite regarding the reproduction quality of electrophotographic printing machines demands improvement of new electrophotographic toner formulation, especially used pigments. The subject of this paper is a comparison of prints realised by depositing high chroma (HC) and standard emulsion aggregation (EA) toner on gloss fine art paper. HC toner has a different composition of the cyan and magenta tones compared with the corresponding standard EA toner tones and therefore behaves differently under real conditions. The patches used for this experiment were cyan and magenta tone prints with tone values (TVs) of 0, 20, 60 and 100%. Ultraviolet (UV) degradation was measured over time intervals of 0, 6, 12, 24, 48, 96, 144 and 240 h for all patches. Results (laboratory values) were calculated using colorimetric difference. Values were plotted as a function of time in tonal degradation graphs. A model was created using non‐linear regression‐based modelling. The experiment demonstrates that magenta patches are more susceptible to degradation in comparison with cyan patches. With the increase in tonal value, it is noticeable that the colorimetric difference is higher. Colorimetric differences calculated using HC magenta toner and standard EA cyan toner (100% TV) were higher than ∆E = 5, starting to appear after 6 h of exposure to UV radiance. After 12 h of exposure, colorimetric differences of standard magenta tones that were greater than ∆E = 5 also started to appear. Cyan patches (100% TV) printed with HC toner were more stable than the other patches, and after 240 h of exposure had not crossed the boundary of ∆E = 5.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Toners For Ep Printingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Light stability in cyan and magenta tones using standard and highly chromatic toner particles

Majnarić

Morić

Modrić

2019

Coloration Technology

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“…Discolouration of a paper may be caused by the formation of chromophores upon ageing as a result of exposure to light and volatile gases. Many volatile compounds as well as alcohols, ketones, aldehydes, carboxylic acids aromatic and aliphatic hydrocarbons and ethers can be released from paper during degradation processes depending upon paper chemical compositions (Gurnagual et al 1993, Majnarič et al 2010. Colour characteristics of inks used on such paper also change in time (Petkova et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Comparison Of Durability BetweenUv Inkjet And Conventional Offset PrintsExposed To Accelerated Ageing

Karlovits,

Gregor-Svetec

2011

J. Graph. Eng. Des.

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The present study deals with the optical and colour stability of aged offset and UV inkjet prints. As a paper substrate, a film synthetic paper was used, which was printed by two techniques (UV inkjet press Óce Arizona 250® GT and conventional offset press KBA Performa 74). Film synthetic paper, offset prints and UV inkjet prints were artificially aged using standard techniques of accelerated ageing, such as moist-heat (80 °C and 65% relative humidity) and dry-heat (105 °C). Ageing was performed for periods of 1, 2, 3, 6 and 12 days. It was found that the moist-heat accelerated ageing influenced the most on optical properties of film synthetic paper. UV inkjet prints had higher colourfastness than the conventional offset prints. The most stable among all tested prints was the black colour UV inkjet print.

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Label legibility influenced by different number of white ink layers

2016

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Original scientific paper A different number of white ink layers printed with the inkjet technology can influence the legibility of prints. Therefore, we tested how to achieve best legibility of printed text and labelling information, considering the changes in colorimetric and typographic properties. The prints were made with an inkjet printer and three different numbers of white ink layers were used. Three different typefaces in four different sizes, appropriate for labelling, were tested. The colour differences were determined colorimetrically and the differences in the typographic tonal density of typefaces were measured with an image analysis. The legibility research was performed with the help of observers who read the printed text in the combination of white ink on black paper and black ink on white paper. The results led to the conclusion that with regard to the colorimetric and typographic quality and effectiveness, the legibility was the best at two layers of white ink. Keywords: colorimetric properties; inkjet; labelling; legibility; packaging design; typography Čitljivost etiketnih deklaracija ostvarenih s višebrojnim nanošenjem bijele bojeIzvorni znanstveni članak Različit broj otisnutih slojeva bijele boje utječe na čitljivost otisaka. U ovom radu testirana je mogućnost postizanja najbolje čitljivosti otisnutog teksta na etiketi, zajedno sa analizom tipografskih svojstava i ostvarenih kolornih promjena. Otisci otisnuti na UV tintnom pisaču imaju mogućnost ostvarivanja većeg broja istih separacija (tri sloja bijele). Pritom su varirana tri tipa i četiri veličine pisma (karakteristična za etiketne deklaracije). Kolorne promjene su određene kolorimetrijski, te izračunom tipografske optičke gustoće slova primjenom slikovne analize. Ispitivanje čitljivosti je izvršena uz pomoć ispitanika koji su čitali tekst u kombinaciji: bijela podloga -crni tekst i crna podloga -bijeli tekst. Rezultati pokazuju da bez obzira na ostvarene kolorimetrijske promjene i različitu kvalitetu tipografske reprodukcije, najbolja čitljivost je ostvarena tiskom u dva sloja.

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The influence of the accelerated ageing on the black screen element of the Electroink prints

Cited by 4 publications

References 5 publications

Light stability in cyan and magenta tones using standard and highly chromatic toner particles

Light stability in cyan and magenta tones using standard and highly chromatic toner particles

Comparison Of Durability BetweenUv Inkjet And Conventional Offset PrintsExposed To Accelerated Ageing

Label legibility influenced by different number of white ink layers

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