Investigations of paper aging-a search for archive paperith paper substrates
| Hlavní autori: | , , , , |
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| Médium: | Článok |
| Jazyk: | angličtina slovenčina |
| ISSN: | 0022-2461 |
| On-line prístup: | http://www.viks.sk/chk/journalofmat_2002.doc |
| Abstrakt: | SUMMARIES. The change of mechanical (folding endurance index, breaking stress, breaking length, breaking index, tear index ), optical (brightness), chemical (cold extract pH, alkali reserve) and physical (water absorbency by surface, smoothness) characteristics of 5 paper samples were measured during the accelerated aging at 105+-2°C, and the measured exponential dependencies were described and fitted by the formal first-order kinetics. The statistic parameters of such fitting calculations evidenced good agreement of the experimental and calculated data. The relative decrease of each paper property corresponding to 48 days of accelerated aging was evaluated in order to compare the durability of paper samples. The best aging resistance was obtained for paper MAESTRO(R) Classic (SCP Ruzomberok, Slovak Republic) and this paper material may be recommended for archival applications. CONCLUSION. The mechanical, optical, chemical and physical properties of 5 paper samples produced in Slovak Republic were monitored during accelerated aging at 105 +- 2°C. The upon aging measured exponential decrease of the monitored paper characteristics was described by the formal first-order kinetics, and the experimental data were fitted using least square analysis. The values of relative decrease in paper characteristics corresponding to 48 days of accelerated aging were calculated and applied in the comparison of paper aging resistance. The best durability in a dry/hot environment was obtained for paper C (MAESTRO(R) Classic, SCP Ruzomberok, Slovak Republic), and this paper material could be appropriate for printing of archival materials. On the other side the hand-made paper E (Petrus, Bratislava, Slovak Republic) represented acid-type paper and showed the consequential destruction of paper material upon aging, therefore its application for archives is not recommended. |
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| ISSN: | 0022-2461 |
