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0. Complete issue
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1. Aiming for G7 Master Compliance
through a Color Managed Workflow:
Comparison of Compliance with
Amplitude Modulated (AM) vs.
Frequency Modulated (FM) Screening
of Multicolor Digital Printing
- Pages: 5-19
- Haji Naik Dharavath
- Abstract | Download | View
Abstract
The purpose of this research was to determine the influence of screening
technologies (AM vs. FM) in the color reproduction aimed at the G7
master compliance. The quality of digital color printing is determined
by these influential factors: screening method applied, type of printing
process, ink (dry-toner or liquid-toner), printer resolution and the substrate
(paper). For this research, only the color printing attributes such as the G7
colors hue and chroma, gray balance, and overall color deviations were
analyzed to examine the significant differences that exist between the
two screening technologies (AM vs. FM). These are the color attributes
which are monitored and managed for quality accuracy during the
printing. Printed colorimetry of each screening from the experiment was
compared against G7 ColorSpace GRACoL 2013 (CGATS21-2-CRPC6) in CIE
L* a* b* space using an IDEAlliance (Chromix/Hutch Color) Curve 4.2.4
application interface with an X-Rite spectrophotometer with an i1iO table.
The measured data of each screening were run through this application
(Curve 4.2.4). The data of each screening were analyzed by using the
Verify Tool of the Curve 4.2.4 application to determine the pass/fail of G7
master compliance levels using G7 ColorSpace tolerances (G7 Grayscale, G7
Targeted, and G7 Colorspace). Analyzed data from the experiment revealed
that the printed colorimetric values of each screening (G7 Grayscale, G7
Targeted, and G7 Colorspace) are in match (aligned) with the G7 master
compliance levels (reference/target) colorimetric values (G7 Grayscale,
G7 Targeted, and G7 Colorspace). Therefore, the press run was passed
by the Curve 4 application for both screening technologies tested.
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2. The effect of electromagnetic
radiation on the reflectance spectra
of prints on hemp papers
- Pages: 21-28
- Ivana Plazonić, Vesna Džimbeg-Malčić, Irena Bates, Gabriel Žilić
- Abstract | Download | View
Abstract
From the moment of production, paper as a printing substrate is exposed
to the process of natural ageing regardless of the type of cellulose fibres
in its composition. Accordingly, the prints produced by the various printing
techniques are also exposed to several factors that impair the quality of
the print i.e. its colour over time. Therefore, it is very important to properly
select the printing substrate for achieving a high quality of graphic products.
For that purpose, three types of papers with hemp fibres were used as
printing substrates which were printed with laboratory hand-operated
instrument Esiproof using flexographic cyan (C), magenta (M), yellow (Y)
and black (K) water-based inks. Prints were artificially aged in SunTEST
XLS+ test chamber according to standard ASTM D 6789-02 for 48 and 96
hours. Based on changes in the reflectance spectra of each printed ink after
exposure to electromagnetic radiation it was noticed how composition
of printing substrate strongly influence on colour stability of prints due
time. An increase of exposure time to electromagnetic radiation leads to a
decrease in the value of the reflectance of the printing substrate and cyan,
magenta and yellow prints. It was confirmed how electromagnetic radiation
have the greatest impact on the reflectance of yellow print, while the black
one is the most stabile regardless of the substrate it was printed on.
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3. Drying methods of the printing inks
- Pages: 29-37
- Ashraf Abd El-Rahman,
Elsayed Saad,
Cem Aydemir,
Samed Ayhan Özsoy,
Semiha Yenidoğan
- Abstract | Download | View
Abstract
Accelerating the transition to post-print processes needed in the printing
industry and shortening the time the product's release time is closely related
to the drying time of the ink film. The drying of fluid ink on the surface
of the print substrate, transforming from liquid to solid occurs physically
and chemically in several ways. Drying systems can be functional alone on
the surface of the printing substrate for an ink film or depending on the
chemical content of the ink and the properties of the printing substrate,
drying can be achieved at the same time with more than one system.
Recently, in order to reduce climate, environmental and health impacts
and with the development of technology, significant changes are also
being experienced in the printing industry and preferences are changing.
In this study, more environmentally friendly LED UV and microwave
drying systems that save time and energy together with existing basic
drying systems such as absorption, evaporation, oxidation-polymerization
and conventional UV used in the printing industry are examined. The
advantages of different drying systems to the printing industry, preferred
drying systems and new studies on this issue have been evaluated.
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4. Impact of packaging shape and material on consumer expectations
- Pages: 39-44
- Suzana Poslon, Dorotea Kovačević, Maja Brozović
- Abstract | Download | View
Abstract
Packaging appearance is important in evoking consumer impressions. No
study has yet explored how two prominent packaging attributes, shape
and material, affect the consumers’ impressions and their expectations in
the case of coffee products. Therefore, the objective of this study was to
investigate whether the packaging shape has an impact on the taste intensity
expected by the consumer, and whether packaging materials influence the
expected coffee quality. In an online experiment, 115 participants evaluated
different packaging samples. They rated the expected taste intensity for
packaging samples that varied in shape complexity (i.e., cylindrical, roundedangular,
hexagonal and multifaceted). They also rated the expected coffee
quality for packaging samples that varied in material (i.e., plastic, aluminium,
glass and metal). The results showed that the packaging with a higher
degree of shape complexity was associated with a higher taste intensity.
Furthermore, we found a negative effect of glass on the expectation of
product quality. The findings could be applied in product packaging design
which aims to match the expected and actual characteristics of the product.
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