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- Béland, M. -C, et al.
(författare)
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Optical measurement and perception of gloss quality of printed matte-coated paper
- 2000
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Ingår i: Journal of Pulp and Paper Science (JPPS). - : Canadian Pulp & Paper Assoc, Montreal, Canada. - 0826-6220. ; 26:3, s. 120-123
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Tidskriftsartikel (refereegranskat)abstract
- A set of 32 commercially produced and printed matte-coated papers were rated for gloss quality by a panel of 13 expert judges and light-scattering distributions, gloss and gloss variation of the prints were measured. Fitting the light-scattering distributions to Von Mises distributions, we obtain a factor, kappa, related to the width of the distribution and sensitive to small changes in surface roughness. This factor relates very well with the subjective rating. Gloss variation in the 3.3 to 6.6 mm wavelength band also correlates well with the gloss quality rating. The topography of the samples was also measured using confocal microscopy and a good correlation was found between the median facet angle and the kappa values.
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| 3. |
- Norberg, Ole, et al.
(författare)
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A comparison of print quality between digital and traditional technologies
- 2001
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Ingår i: IS&T’S INTERNATIONAL CONFERENCE ON DIGITAL PRODUCTION PRINTING AND INDUSTRIAL APPLICATIONS. - Springfield : SOCIETY IMAGING SCIENCE TECHNOLOGY. - 089208233X ; , s. 380-385
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The digital print technologies are advancing both in quality and market share. Today, the print quality of digital printed material has improved and is considered to bee good enough for most purposes. However, the great advantages of digital printing are short runs and variable data printing. In this investigation the print quality of different digital printing technologies, today present on the market, are compared with the quality of traditional technologies such as offset and flexography. A wide range of digital presses, from large production presses to smaller devices for office use, was tested. The substrates used, were all chosen to fit the specific printing technology. The print quality was evaluated by subjective evaluation as well as by technical measurements. To make the comparison of prints from different presses meaningful, color management has been an essential part of the process. An ICC-profile was created for each combination of substrate and press. The results indicate that the offset print quality on fully coated paper is still ahead of what is possible to achieve with digital printing techniques today. This study shows that disturbance, like mottling and gloss variation, are the main shortcomings of the digital printing technologies. Another result, shown in this study, is the fact that digital printing is less sensitive to type of substrate.
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| 4. |
- Arvidsson, Niklas, et al.
(författare)
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Cirkulära möbelflöden : Hur nya affärsmodeller kan bidra till hållbar utveckling inom offentliga möbler
- 2017
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Sverige har en stark möbelindustri och en stolt tradition av att tillverka tidlösa och högkvalitativa möbler, ofta av naturmaterial. 2016 producerade Sverige möbler för 22,8 miljarder SEK, varav kontorsmöbler stod för nästan en fjärdedel1. Det saknas idag statistik över vad som händer med dessa möbler när de inte längre används, men det står klart att många av dem slängs i förtid när verksamheter flyttar eller när deras behov ändras. Samtidigt syns en tydlig utveckling mot att kunder mer och mer efterfrågar återbrukade eller renoverade möbler som en del i sitt hållbarhetsarbete. Denna utveckling var startpunkten för projektet ”Affärsmodell-innovation för cirkulära möbelflöden”. Affärsmodellinnovation för cirkulära möbelflöden är ett Vinnovafinansierat projekt som under åren 2015-2017 arbetat med att utveckla och testa koncept för cirkulära affärsmodeller för i första hand offentliga möbler. I projektet har tjugo aktörer från hela värdekedjan, från underleverantörer, möbelproducenter, återförsäljare och användare till forskare och branschorgan, samarbetat kring affärsutveckling, kundincitament, produktdesign, logistik, hållbarhets- och certifieringsfrågor. Den här skriften belyser hur nya affärsmodeller för mer cirkulära möbelflöden kan bidra till en mer hållbar utveckling och ger smakprov på slutsatser från projektet. Skriften riktar sig framför allt till producenter och återförsäljare av möbler för offentliga miljöer, men även kunder och inköpare tror vi kan ha stor nytta av skriften. Vi hoppas att den även kan fungera som inspiration för andra industrier och branscher som funderar på en övergång till mer cirkulära affärsekosystem.
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| 5. |
- Beland, Marie-Claude, et al.
(författare)
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Optical measurement and perception of gloss quality of printed matte-coated paper
- 1998
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Ingår i: Proceedings of the International Printing and Graphic Arts Conference. - : CPPA, Montreal, Canada. ; , s. 187-191
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Konferensbidrag (refereegranskat)abstract
- A set of 32 commercially produced and printed matte-coated papers were rated for gloss quality by a panel of 13 expert judges and light scattering distributions, gloss, and gloss variation measured. Fitting the light scattering distributions to Von Mises distributions, we obtain a factor, kappa, related to the width of the distribution and sensitive to small changes in surface roughness, which relates very well with the subjective rating. Gloss variation in certain surface spatial wavelength bands also correlates well with the gloss quality rating. The topography of the samples was also measured using confocal microscopy and the relationship between light scattering and paper topography is discussed.
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| 8. |
- Coppel, Ludovic, et al.
(författare)
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Modelling the effect of simultaneous contrast on perceived whiteness
- 2008
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Ingår i: 4th European Conference on Colour in Graphics, Imaging, and Vision and 10th International Symposium on Multispectral Colour Science. - : The Society for Imaging Science and Technology. - 9781605607023 ; , s. 183-188
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Konferensbidrag (refereegranskat)abstract
- The perceived colour from a surface does not only depend on its optical properties and the illumination. Several studies have demonstrated the simultaneous contrast effect that makes the appearance of coloured patches depend on neighbouring colours. In this study the perceived whiteness of white patches surrounded by induction fields of different shades was evaluated by asking observers to give a magnitude estimate of perceived whiteness of the patches in comparison to a white reference. The perceived whiteness of patches with identical tristimulus values was highly dependent on the shade of the induction field and the patch size did not significantly affect the perceived whiteness. The recent CIECAM02-m2 colour appearance model was tested together with two whiteness equations. A combination of ClECAM02-m2 and a non-linear whiteness equation defined in the whole colour space predicted much of the observed simultaneous contrast effect. However, the model performed better for dark induction fields than for light induction fields. The model rated patches surrounded by light blue and light yellow equally, whereas the observers clearly rated the patches with light yellow induction field as whiter than the patches with light blue induction field. A deeper analysis of the CIECAM02-m2 model indicated that the simultaneous contrast model used cannot accurately predict the change in hue for high lightness induction fields. A potential improvement for predicting contrast simultaneous effect would be to base the calculations not only on the difference between the induction field and the background, but on the difference between the patch stimulus and the induction field.
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