Angela SOLDO Condolences | rodance.info
Jun International Conference Matrib In order to enables better reproducibility of printing, during printing production of exclusive packaging we use additional PANTONE colors. Thus, an additional fifth printing unit will accomplish printing special corporate colour shades. Label legibility influenced by different number of white ink layers.
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.
Ecological Sustainability and Waste Paper Recycling. In accordance with environmental sustainability and in order to optimize the recycling process of prints from indirect electrophotography with liquid toner the results of investigating the effects of changes in printing conditions on the characteristics of recycled fibres is presented. Changing of printing machine conditions, respecting of voltage variations, comprises of the reverse rollers and intermediate cylinder.
Based on the results it can be concluded that the change in the voltage of the reverse rollers more affect the recycling efficiency with respect to the voltage change of the intermediate cylinder. Brightness gain is higher when the print for recycling is made on uncoated paper compared to coated, and dependent on the voltage changes. Effective residual ink concentration decreases far more on handsheets obtained from recycled samples on uncoated paper in relation to both sides coated paper.
Guidelines for the size of the voltage in order to obtain optimal print reproduction are provided. The further research will include the development in area of clean technologies, advanced materials, closed loop systems; therefore the significant terms in the area of environmental sustainability. Published by Elsevier Ltd.
The influence of heat treatment on print mottle of screen printed textile knitted fabrics. Printed fabric is widely used, and it is exposed to various influences.
One unavoidable impact is heat treatment during subsequent maintenance e ironing. Hence, many printed textile materials are exposed to different temperatures. Textile can be printed with conventional screen and digital Inkjet print technologies. In this paper, we analyzed screen printed textile and its sustainability after heat treatment. Heat can not only change the reproduced colour, but also affects the print uniformity print mottle. The goal of this paper was to find what could be controlled and changed in order to get long-lasting printed textile.
We used one natural textile material e cotton that was printed with screen print technology. Constant parameter during the experiment was a time of heat treatment. Ironing temperature and screen mesh count were varied.
Results showed that samples printed with smaller screen mesh count maintain print uniformity after heat treatment. One unavoidable impact is heat treatment during subsequent maintenance - ironing. We used one natural textile material - cotton that was printed with screen print technology. Three specimens of each type of IPS e. Specimens were made in the form of plates 10 mm x 12 mm x 0. Further, exposure to a corrosive medium did not result in a statistically significant change of TP values in any of the materials tested.
Different types of glass-ceramics showed significant difference in TP values both with respect to the fabrication technique and colour. Exposure to a corrosive medium did not result in a statistically significant change of TP values.
The influence of ink concentration and layer thickness on yellow colour reproduction in liquid electrophotography toner. In liquid toner electrophotography, colour gamut is often diminished in the yellow region leading to problems with photo quality prints.
It is known that the concentration of pigment particles in the printing ink and its thickness when applied on a paper substrate decisively influence final print quality. Variation of these two parameters for the yellow process ink was performed by modifying the printing process of the electrophotographic printer HP Indigo S Printed colour patches of ECI test chart were analysed colorimetrically and using image analysis approach.
Two-way analysis of variance was implemented to statistically assess the obtained results. Both studied responses — colour gamut volume and area coverage of halftone dots — were found to be primarily influenced by the yellow ink layer thickness and much less by the ink concentration. Increase from one to two ink layers had a significantly stronger effect on each of the two responses when compared to an additional increase from two to three layers.
The influence of thermal load on the print quality of screen printed knitted fabrics. High surface texture of textile materials appears rougher and more porous than other printing substrates which can cause excessive ink penetration. Also, high temperature thermal loads affect the characteristics of printed ink and cause structural changes of the textile substrate material as well. The aim of this paper is to determine the influence of thermal load on the print quality of cotton based fabrics with different knitting types via surface macro non-uniformity and line quality determination of the printed samples.
The research results indicated that the thermal load had a negative influence on the line quality parameter and a positive effect on the macro non-uniformity parameter. The directions of the ecological sustainability in printing reproduction are in the area of the application of the renewable and recycled raw materials, in the decrease of the energy consumption, the usage of the energy from the renewable sources and in the production without waste.
This article presents the research results of voltage changes of the intermediate cylinder in indirect electrophotography with liquid toner on dirt count and area on handsheet made from fibers after prints pulping and flotation, brightness and effective residual ink concentration. Since on the indirect transfer of ElectroInk except the voltage of the intermediate cylinder also impacts temperature, its influence on the dirt count and area is showed.
Uncoated and both side coated substrates were used for printing. The results show that changes in voltage of the intermediate cylinder in the printing affects the characteristics of pulped and floated fibers and dirt count and area on handsheets. Dominant factor of studied process is surface treatment of the printing substrate.
Maximum efficiency of deinking flotation The results show that an increase in temperature of the intermediate cylinder increases dirt count and area on handsheetst after pulping prints under experimental conditions. Increased efficiency of flotation was found for print obtained at a lower temperature of the intermediate cylinder. This article aims to define attributes of image quality that affect the quality of textured UV varnish applied as a pattern effect over offset prints.
The most common UV varnishing problems that might influence attributes of print quality are reticulation of the varnish, poor adhesion, spreading of the varnish and shade changes. These problems mostly arise from inability to control the coating, especially if applied on differently generated print surfaces. Benefits of UV coatings in terms of image quality improvements might be greater opacity, color stability, deeper and more vibrant colors, sharper graphics, higher gloss and uniform surface to give labels a more vibrant look.
Image quality variation assessment often needs to be carried out since an improvement made to one attribute can result in a deficiency to another attribute or attributes. In order to determine correlations between these attributes, a combination of objective and subjective image quality assessments has been applied.
Jun ISNG The main goal of our study was to investigate the compliance of existing books in Slovenia for children who are blind or visually impaired with known requirements and standards. Results of the analyses were made by legibility and suitability tests based on interviews, made with 11 blind children and their teachers.
It was concluded form the results that respondents children found Braille text in almost all the samples unlegible. But not all results were bad; our analysis confirmed the suitability of UV-inkjet printing technology for printing Braille.
The number of samples and involved blind persons with Braille literacy was not high enough to get statistically valid answers and confirmations, however it was evident that even blind children that are not perfect Braille users can use good UV printed Braille text.
Visibility of graphic elements on textiles. The aim of the research was to ascertain what factors need to be taken into consideration to be able to give recommendations on ensuring the visibility of symbols and typographic elements on logos and textile care labels.
From being sewn-in, these are nowadays more frequently printed directly on the final product. For the research purpose, the prints were made on a natural material in one, two and three layers of ink with the inkjet printing technology. The prints were exposed to a different number of wash and tumble drying cycles 1—5. The fastness of prints was better when the ink was printed in two or even three layers. The most substantial difference in the fastness of printed text was measured at smaller type sizes 6 and 8 pt.
The smallest acceptable size of simple textile care symbols is 4. Accelerated and natural ageing of offset prints covered with different varnishes. The aim of this work was to determine the dependence of the colour fading of offset prints on the ageing process, relative to prints overprinted with water-based dispersion varnish and UV-cured varnish.
Natural ageing outdoor conditions and the exposure to sunlight filtered by glass windows and accelerated ageing moisl heat and light xenon arc lamp treatments were carried out. In order lo determine colour fading, colour difference, 2D gamut values and characteristic cross sections L20, L50 and L80, as well as 3D gamut values were used. The yellow colour showed the largest colour difference when offset prints were exposed to accelerated ageing by means of exposure to xenon light. No significant stability was achieved by varnishing the yellow print with water-based dispersion varnish and UV-cured varnish.
This was also the case with magenta. An increase of the gamut occurred after one week's exposure of prints coated with water-based dispersion varnish to moist heat ageing. In contrast, on exposure of prints coated with UV-cured varnish, a decrease of gamut appeared.
On further exposure of prints covered with either kind of varnish a decrease of gamut was evident. Indoor exposure of varnished prints to sunlight through a glass window had a minor influence on the gamut volume change in comparison with the exposure of prints to outdoor conditions.
The possibility of using recovered office paper grades as alternative raw material in the manufacture of white top plies of food packaging linerboards is a major area of investigation. Three different types of office print-outs had been submitted to a chemical deinking flotation and the handsheets formed after each deinking flotation trial were analyzed on the presence of residual chemical contaminants: Moreover, bleed fastness of fluorescent whitened agents FWA was determined as well.
The conducted research showed that of all analyzed contaminants in the deinked pulp handsheets, only phthalates were detected, in concentrations from 5.