• role of thermoxidation and depolymerisation in the ageing of systems paper/gum arabic/historical ink

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1030
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the aim of this study was to assess the role and proportional representation of depolymerisation and thermoxidation reaction paths in the systems paper/gum arabic (ga)/historical ink during various accelerated ageing methods. the historical inks under study are iron-gall, bistre, and sepia. the results indicate that thermoxidation represents only a minor reaction path in the ageing of paper/ga/ink systems except for the iron-gall ink and the light-thermal method of accelerated ageing. the iron-gall ink accelerates both reaction paths of ageing, i.e. thermoxidation and depolymerisation; in this case, thermoxidation might become the prevailing degradation reaction path. for the sepia ink, an anti-depolymerisation stabilising effect in thermal methods of ageing has been detected. considering the thermoxidation reaction path, the results even suggest that a compound preventing thermoxidation is formed during the thermally accelerated ageing in air and in 100 mg l−1 of no2. in the light-thermal ageing, the most stable sample is the whatman paper (w)/ga/bistre ink.

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