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ZMENY VYBRANÝCH CHARAKTERISTÍK KANCELÁRSKEHO PAPIERA V PRIEBEHU SIMULOVANÉHO STARNUTIA/CHANGES OF CHOSEN CHARACTERISTICS OF OFFICE PAPER DURING THE PROCESS OF SIMULATED AGEING
Acta facultatis xylologiae Zvolen, 2015-01, Vol.57 (1), p.53
ISSN: 1336-3824
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Title:
ZMENY VYBRANÝCH CHARAKTERISTÍK KANCELÁRSKEHO PAPIERA V PRIEBEHU SIMULOVANÉHO STARNUTIA/CHANGES OF CHOSEN CHARACTERISTICS OF OFFICE PAPER DURING THE PROCESS OF SIMULATED AGEING
Author:
Geffertová, Jarmila
;
Geffert, Anton
Is Part Of:
Acta facultatis xylologiae Zvolen, 2015-01, Vol.57 (1), p.53
Description:
The aim of the article has been to follow the changes of the chosen characteristics of office paper during the process of simulated ageing. Simulated ageing caused the small increase of paper porosity, which was shown by the increase of air permeability by only 72 mL·min^sup -1^. The breaking length values retained their stability of up to 95%, while the stability of tear index after 24-hour ageing was only 67%. After 200-second swelling the swelling ability of paper decreased by 15%, what represented preservation of stability only up to 57.7%. The brightness value decreased considerably too and shifting in colour space CIE L*a*b* was recorded as well. The differential spectra in monitored time intervals had similar trend with minimum of reflection at 430 nm. The biggest value changes of air permeability, tear index, pH of paper surface, swelling, brightness and reflectance were determined after 6-hour ageing. The values of the mentioned characteristics decreased only slightly in the following time intervals of ageing.
Publisher:
Zvolen: Technical University in Zvolen
Language:
Slovak
Identifier:
ISSN: 1336-3824
Source:
ProQuest Central
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