Aged paper

Printed in Switzerland on acid-free and non-aging paper (ISO 9706) by Reinhardt Druck, Basel... 

Sometimes, even in this electronic age , paper is still the medium of choice. For retained records that must be made available to personnel responding to an emergency, paper is a better medium than electronic media, because paper can remain accessible during emergency events (e.g., power outages, fires, floods, etc.) that could render electronic records inaccessible. 

Reitan, R.M. Behavioral manifestations of impaired brain function in aging. Paper presented at the Annual Meeting of the American Psychological Association, Montreal, 1973. 

Wetheril 1, G. W., Multiple Cosmic Ray Exposure Ages, paper presented at 43rd meeting of Meteoritical Society, La Jolla, Calif., 1980, Meteoritics (in press). 

Once It had been established that the process was applicable to a large range of aged papers, work was undertaken to see If whole book treatment was possible. A simple process was used which Involved the following steps ... 

Brennan MB. New age paper and textiles Fungi, enzymes and closed-loop catalysis offer environmental, economic gains in manufacturing and recycling. CENEAR March, 1998 23 39-47. 

A color palette for various shades of browns (obviously the most useful for repair of aged papers) has sometimes been achieved through the use of different kinds of unbleached fibers such as unbleached kraft, linen, or cotton. At this point, however, it should be pointed out that pulp designed for use in book repair may differ in its requirements from that used on art objects. Pulp used on art objects must withstand continual exposure to light without significant alteration in color. Unbleached kraft, linen, or cotton fibers tend to become lighter with prolonged... 

Naturally Aged Papers, W. J. Barrow Research Laboratories, Richmond, Va., 1964. 

Natural or artificially accelerated aging of papermaking pulps is characterized by two important reactions, scission of the polymeric cellulose chains and some cross-linking reaction (7,8,9), the exact nature of which remains unknown. Since the mechanical properties of aged paper are modified by these two simultaneous reactions, it was of interest to determine whether these chemical effects influence the thermograms of artificially aged papers. 

The Effects of Varying Relative Humidity Conditions on the Folding Endurance of Aged Paper Samples... 

Filter Paper with Hemicellulosic Fractions Added On. Hemicellu-lose fractions were isolated from unaged and thermally aged papers by extraction with LiOH, following the procedure described by Giertz and McPherson (6). The changes in postcolor number [100(K/S) — (K/S)0] (7) for various test sheets during exposure to visible and UV radiation and to heat are shown in Figures la, lb, and lc for material extracted from... 

Some Foldur kraft samples were preaged before borohydride treatment and further aging. Paper samples were subjected to accelerated aging at 100 °C in a dry oven for 14 h or at 90 °C and 50% rh for 7 h. 

Adsorption of transition metal species during processing, cellulose, 388 Advisory panels for standards for archival materials, potential benefits, 311 Age of cellulosic textiles determination from single-fiber creep measurements, 19-38 effect on crystallinity, 417 effect on rate of degradation, 416-17 Aged paper... 

Durbeej, B., and Leif A. Eriksson. 2005. Photodegradation of substituted stilbene compounds What colors aging paper yellow J. Phys. Client. A, 109(25) 5677-5682. 

This work focused on studying the used of CMC-Cu(II) complexes as a new approach for the preparation of high-performance colored paper. In this respect, the paper strength, thermal stability, biological resistance, magnetic properties, as well as the durability of aged paper were evaluated. 

Paleos, C. M., Mavroyannakis, E. G., Cypriotaki, I. (1981). Preservation of aged paper by alkoxysrlanes. In 6th triermial meeting Ottawa, 21-25 September 1981 Preprints, 81(16), 6. International Council of Museums Committee for Conservation. 

J. Jacobs and G. P. Wozadlo, Irradiation Assisted Stress Corrosion Cracking as a Factor in Nuclear Power Plant Aging, Paper presented at the July 8-10, 1985 International Conference on Nuclear Power Plant Aging, Availability Factor and Reliability Analysis, and published in conference proceedings, p. 173, dated August 1985, American Society for Metals, Metals Park OH 44073. 

If new paper is torn the fibers slide apart without breaking. This can be sho wn with pictures from a scanning electron microscope of the angles of cracks of aged and non-aged paper after a strain-to-stress measurement (Fig. 13.5). The fibers of the new paper only slid apart whereas in the aged paper they broke. This means that the fiber-fiber bonds in new paper and the individual fibers in aged paper are the mechanically weaker points. 

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