Eškinja, Stanko (2013) Svjetlosna postojanost četverobojnih i šesterobojnih HP Indigo otisaka. Master's thesis - Graduate Programme. Grafički fakutet. [Mentor: Majnarić, Igor].
|
PDF
DB258_Eskinja_Stanko.pdf Download (12MB) | Preview |
Abstract
Kako bi reprodukcija imala vrhunsku kvalitetu uz standardna CMYK bojila otiskujemo i specijalna bojila, koja će povećati kvalitetu reprodukcije. Jedna od digitalnih tehnika tiska koja to može postići je elektrofotografija s tekućim tonerom. Specijalne boje koje se najčešće dodaju su narančasta i ljubičasta (IndiChrome tisak) jer je njihova reprodukcija najlošija iz CMYK bojila. Ovim radom pokazat ćemo kako ultraljubičasto elektromagnetsko zračenje utječe na postojanost otiska odnosno gamuta. Osmišljena je tako studija će se isti otisak stariti u vremenskim intervalima od 6, 12, 24, 48, 96, 160 i 244 sata. Nastale kolorne promjene detektirati će se kolorimetriskim mjerenjem. Na kvalitetu reprodukcije utječe i podloga. Zbog toga su korištene i dvije karakteristične tiskovne podloge: papir za umjetnički tisak Magno star Gloss i naravni (ofsetni) papir Maxio set. U kolorimetrijskim mjerenjima vidljivo je da će se u duljim vremenskim intervalima postepeno gubiti kolorna svojstva, tiskovna podloga utječe na kvalitetu reprodukcije tj. Papiri za ofsetni tisak brže će se degradirati. Za analizirane tonove one nisu jednake. Tako se najviše mijenja puni ton ljubičastog bojila (ΔE100%=21,58) dok se najmanje mijenja puni ton cijan bojila (ΔE100%=1,85). Rastrirani tonovi se slično ponašaju te najbolji rezultat od svih rastiranih tonova ima 80% RTV cijan (ΔE80%=2,25), a najgori 80% RTV ljubičasta (ΔE80%=24,30).
| Item Type: | Master's thesis - Graduate Programme |
|---|---|
| Mentor name: | Majnarić, Igor |
| Defence date: | 24 September 2013 |
| Abstract in english: | For reproduction to have high quality it is necessary to add special printing colours to standard CMYK colours. One of digital printing techniques which can achieve high level of precision is electrophotography with liquid toner. Special colours witch are usually add are orange and violet (IndiChrome print), because there reproduction is the worst from standard CMYK colours. The study shows how ultraviolet radiation (UV) effects on constancy of colour gamut. It will be conceived as accelerated ageing same print in time intervals of 6, 12, 24, 48, 96, 160 and 244 hour. The resulting colour changes are detected using a colorimetric measurement. Reproduction quality is also affected by printing substrate. For this reason are used two typical printing substrates: fine art paper Gloss Mango star and natural (offset) paper Maxio set. In colorimetric measurements is palpable that longer intervals of ageing prints will lose their properties. For the analysed tones they are not equal. Thus, the most varied full tone is purple dye ΔE100% = 21.58 while the least changing full tone is cyan (ΔE100% = 1.85). Screened tones behave similarly, and the best result of all screened tones has 80% tone value cyan (ΔE80% = 2.25), and the worst 80% tone value purple containing (ΔE80% = 24.30). |
| Uncontrolled Keywords: | Šesterobojno otiskivanje, Elektorfotografija, Ubrzano starenje, Elektroink bojilo |
| Keywords in english: | Six-colour printing, Electrophotography, Accelerated ageing, Electroink |
| Subjects: | TECHNICAL SCIENCES > Graphic Technology |
| Institution: | Grafički fakutet |
| City: | Zagreb |
| Number of Pages: | 107 |
| Callnumber: | maj 2013 ešk |
| Inventory number: | DB258 |
| Depositing User: | Dora Budić |
| Status: | Unpublished |
| Date Deposited: | 16 Apr 2014 07:59 |
| Last Modified: | 16 Apr 2014 07:59 |
| URI: | http://eprints.grf.unizg.hr/id/eprint/1552 |
Actions (login required)
 |
View Item |
Download Statistics
Download Statistics