1. bookVolume 62 (2018): Issue 1 (February 2018)
Journal Details
License
Format
Journal
First Published
03 Apr 2012
Publication timeframe
4 times per year
Languages
English
Copyright
© 2020 Sciendo

Study of triacetate cinematographic films and magnetic audio track by infrared spectroscopy

Published Online: 16 Feb 2018
Page range: 26 - 32
Journal Details
License
Format
Journal
First Published
03 Apr 2012
Publication timeframe
4 times per year
Languages
English
Copyright
© 2020 Sciendo

Most of the cinematographic film collections stored in film archives are made on a triacetate base, and from the 1950s to the 1980s, a magnetic track was used to record sound. With a large number of archive materials, archives often do not know the chemical composition of film bases, history of use and degradation rates. Therefore, the chemical composition of three films with a magnetic audio track and one representative of the modern film FOMAPAN were investigated by infrared spectroscopy. Selected samples were artificially aged at elevated temperatures and humidity, and the rate of degradation of the film was evaluated by infrared spectroscopy, dimensional changes and gravimetric analysis. Based on the measurements, all of the examined films were made from cellulose triacetate and the binder of the magnetic trackswas cellulose nitrate. To determine the degree of degradation of the binder of the audio track and the triacetate base, a degradation index was created which expresses the ratio of the bandwidths of the characteristic groups in the infrared spectra. It is shown that infrared spectroscopy makes it easy to determine the chemical composition of cinematographic films and to quantify the rate of degradation and the current state of the film base using a suitably chosen degradation index.

1. Read, P.; Meyer, M.-P., Restoration of motion picture film. Butterworth-Heinemann: 2000.Search in Google Scholar

2. Bednařík, D., Historie a současnost záznamu filmového zvuku. Bakalářská práce, UTB Zlín, 2008.Search in Google Scholar

3. Bressan, F.; Bertani, R.; Furlan, C.; Simionato, F.; Canazza, S., An ATR-FTIR and ESEM study on magnetic tapes for the assessment of the degradation of historical audio recordings. Journal of Cultural Heritage2016, 18, 313-320.10.1016/j.culher.2015.09.004Open DOISearch in Google Scholar

4. Hess, R. L., ARSC Conference Paper-Tape Degradation Factors and Challenges in Predicting Tape Life. ARSC Journal2008, 39 (2), 240-274.Search in Google Scholar

5. Mizumura, Y.; Hiura, N.; Miyake, H., Magnetic recording medium. Google Patents: 1979.Search in Google Scholar

6. Edge, M.; Allen, N.; Chen, W.; Horie, C., Degradation of magnetic tape: binder oxidation studies. European Polymer Journal1993, 29 (8), 1031-1035.Search in Google Scholar

7. Newnham, M. In The Sticking Point: Dealing With Blocked Motion Picture Films, Sustainable Audiovisual Collections Through Collaboration: Proceedings of the 2016 Joint Technical Symposium, Indiana University Press: 2017; p 205.Search in Google Scholar

8. Schilling, M.; Bouchard, M.; Khanjian, H.; Learner, T.; Phenix, A.; Rivenc, R., Application of chemical and thermal analysis methods for studying cellulose ester plastics. Accounts of Chemical Research2010, 43 (6), 888-896.Search in Google Scholar

9. Komárek, J., Deriváty celulózy. SNTL: 1966.Search in Google Scholar

10. Horvath, D. G., The acetate negative survey. University of Louisville, Ekstrom Library, Photographic Archives: 1987.Search in Google Scholar

11. Shashoua, Y., Conservation of plastics. Routledge: 2012.Search in Google Scholar

12. Gómez Sánchez, E.; Simon, S.; Koch, L.-C., ATR-FTIR spectroscopy for the characterization of magnetic tape materials. e-Preservation Science2011, 8, p. 2-9.Search in Google Scholar

13. Bigourdan, J.; Reilly, J. M.; Santoro, K.; Salesin, G., The preservation of magnetic tape collections: a perspective. NEH Grants PA-50123-03, Image Permanence Institute, Rochester Institute of Technology, Rochester, NY, USA 2006, 29.Search in Google Scholar

14. Hnětkovský, V. Studie o acetylaci dřevné sulfitové celulosy. Dizertační práce, VŠCHT Praha, 1938.Search in Google Scholar

15. Ballany, J.; Littlejohn, D.; Pethrick, R. A.; Quye, A., Probing the factors that control degradation in museum collections of cellulose acetate artefacts. ACS Publications: 2001.Search in Google Scholar

16. Reilly, J. M.; Reilly, J. M., IPI storage guide for acetate film. Image Permanence Institute Rochester: 1993.Search in Google Scholar

17. Hummel, D. O.; Baum, A., Atlas of polymer and plastics analysis. Hanser Publishers: 1991.Search in Google Scholar

18. Edge, M.; Allen, N. S.; Hayes, M.; Riley, P.; Horie, C.; Luc-Gardette, J., Mechanisms of deterioration in cellulose nitrate base archival cinematograph film. European Polymer Journal1990, 26 (6), 623-630.10.1016/0014-3057(90)90218-SOpen DOISearch in Google Scholar

Plan your remote conference with Sciendo