Phytate: a Potential Conservation Agent for the Treatment of Ink Corrosion Caused by Irongall Inks

Neevel, Johan G.

doi:10.1515/rest.1995.16.3.143

Cited by 116 publications

(91 citation statements)

References 14 publications

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“…Cycling RH also has an effect on iron gall ink on paper, as it causes iron(II) ions to diffuse out of ink regions, as discussed by Neevel [63,64]. In this work, samples were exposed to relative humidity cycled between 35% and 80% (3 h at each RH, 12 min ramp), and migration of the ink was observed on samples, aged for 18 days.…”

Section: Temperature and Relative Humidity Fluctuationmentioning

confidence: 78%

Dose–response functions for historic paper

Menart

Bruin

Strlič

2011

Polymer Degradation and Stability

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Paper degradation has been studied extensively over the past few decades from both the conservation and the material science perspectives. This review focuses on the quantifiable impacts of the environment and material composition, from the viewpoint of long-term storage of historic paper-based collections. Therefore, temperature, relative humidity and their variation, and pollution are of major interest while photoinitiated processes are covered only briefly.New experiments comparing the effects of the most abundant indoor pollutants (NO 2 , acetic acid and formaldehyde) and the effects of fluctuating temperature and relative humidity are also presented as part of the discussion. This work highlights the need for revision of the existing doseresponse (damage) functions for paper and their further development. KeywordsHistoric paper; hydrolysis; oxidation; viscometry; colorimetry; heritage science Historic paperDespite the ubiquity of electronic media, paper is still the most generally readable carrier of information. In heritage institutions, collections of documents of the past are being preserved for posterity. It has been estimated that in a typical Western repository, 70-80% of these documents [1] are likely to be acidic and therefore prone to rapid deterioration, their useful lifetime being about a century, a couple at best. This is in a stark contrast to paper produced before ca. 1850, the lifetime of which may be longer for at least a factor of 10 [1]. For curators of these collections, interventive conservation is an option, although the throughput of even mass treatments [2] is not sufficient to address the scale of the problem and the resources are too limited. Stab 96 (2011Stab 96 ( ) 2029Stab 96 ( -2039 2 In many cases, preventive conservation is therefore the preferred option. However, environmental managers may struggle with the abundance of literature available on environmental effects on paper degradation and the surprisingly scarce data that is well quantified and relevant not only to the scientist but to the user as well. Unlike a recent comprehensive review of the basic mechanistic and thermodynamic concepts [3], the focus of the present review is to provide an overview of dose response functions, based on which environmental management in paper-based collections could be optimised to minimise degradation while optimising resource use. Published in Polym DegradThe main structural component of paper is cellulose. As a linear homopolymer, it is composed of identical monomers and scission of inter-monomer bonds leads to its degradation [4]. It is well known that apart from temperature, water (humidity) and acidity in paper are important factors in its degradation [5][6][7]. Acid-catalysed hydrolysis is a major cause of paper strength loss [5,7], although other mechanisms may take place as well, such as oxidation and thermal degradation [7,8], depending on the experimental conditions. The effect of oxygen on the hydrolytic pathway should not be neglected, as differences between accelerate...

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Section: Temperature and Relative Humidity Fluctuationmentioning

confidence: 78%

Dose–response functions for historic paper

Menart

Bruin

Strlič

2011

Polymer Degradation and Stability

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“…All these reactions may compete with each other. Moreover, as most of original recipes correspond to a large excess of iron compared with gallic acid [7], the iron gall ink precipitate formation is most probably not the dominant reaction involving iron.…”

Section: Introductionmentioning

confidence: 99%

Application of Arrhenius law to DP and zero-span tensile strength measurements taken on iron gall ink impregnated papers: relevance of artificial ageing protocols

et al. 2016

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Iron gall inks (IGI) were largely used for writing until the nineteenth century. Under certain circumstances, they provoke a substantial degradation of their cellulosic support. It was shown in a previous works that combination of oxygen and iron largely impacts cellulose chain breaking occurring in acidic conditions (pH 3-4). The present study aims to study the kinetic of this degradation. It assesses the validity of Arrhenius law between 20 and 90°C taking advantage of the fast depolymerization of IGI impregnated papers at room temperature and using two complementary tools: DP measurements and zero-span tensile strength. The first one is sensitive enough to measure degradation at its very beginning, while the second is more appropriate for advanced stage of degradation. Similar activation energies (97 ± 2 kJ mol -1 ) were found via DP and zero-span measurements, and reaction rates of IGI impregnated papers were 1-2 orders of magnitude above available data related to lignin-free acidic papers. These observations suggest a dominant hydrolytic mechanism that involves directly or indirectly oxygen and iron.

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“…La combinazione di questi meccanismi provoca la perdita di resistenza meccanica tipica dei manoscritti con inchiostri ferrogallici; in essi non è raro trovare perforazioni in corrispondenza delle zone più ricche di inchiostro. Per ovviare a questo problema, sono stati proposti alcuni metodi conservativi basati sull'impiego di sostanze antiossidanti seguito da un trattamento per la neutralizzazione dell'acidità (Malešič et al 2005a(Malešič et al , 2005bKolar et al 2005;Neevel 1995Neevel , 2000. In alcuni studi recenti è stato dimostrato che l'attività catalitica degli ioni ferro è massima a pH 8, ma è quasi totalmente assente intorno alla neutralità (Strlič et al 2003).…”

Section: Poggi Et Al La Chimica Dei Nanocomposti 293unclassified

La chimica dei nanocomposti e la loro applicazione al restauro dei manoscritti

Poggi

Bonelli

Giorgi

et al. 2018

Dalla Tutela Al Restauro Del Patrimonio Librario E Archivistico

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Cellulose-based artifacts are susceptible to fast degradation due to the presence of detrimental components and to the action of environmental pollutants. As a result, the acidity of pristine material increases, promoting the acid-catalysed depolymerisation of cellulose that alters the mechanical properties of paper. In this paper, the use of innovative dispersions of alkaline earth metal hydroxide nanoparticles will be discussed as a method of counteracting the degradation of paper. The application of the most recent formulations of nanoparticles dispersions for the deacidification of artworks will be highlighted. Finally, the usage of innovative gel formulations for the cleaning of cellulose-based artworks will be discussed. Keywords Nanotechnology. Deacidification. Cleaning. Cellulose. Nanoparticles. PremessaUn recente studio ha messo in luce quanto preoccupante, se non drammatica, sia la situazione in cui versa il patrimonio librario e archivistico mondiale: un terzo degli oggetti, infatti, si trova in condizioni tali da richiedere un intervento conservativo immediato, pena la perdita completa della loro fruibilità. Un ulteriore terzo raggiungerà tale stato in meno di cento anni. Appare, dunque, chiaro che la preservazione del patrimonio librario debba essere una priorità nel campo della conservazione dei beni culturali e che maggiori sforzi debbano essere profusi nella ricerca di soluzioni efficaci a tale scopo.I materiali a base cellulosica sono soggetti all'azione concomitante di idrolisi acida e ossidazione che determinano in essi i noti fenomeni di corrosione e ingiallimento. Più nello specifico, le sostanze acide presenti nella carta catalizzano la depolimerizzazione della cellulosa, con conseguente perdita delle proprietà meccaniche originali del materiale. Al fine

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Phytate: a Potential Conservation Agent for the Treatment of Ink Corrosion Caused by Irongall Inks

Cited by 116 publications

References 14 publications

Dose–response functions for historic paper

Dose–response functions for historic paper

Application of Arrhenius law to DP and zero-span tensile strength measurements taken on iron gall ink impregnated papers: relevance of artificial ageing protocols

La chimica dei nanocomposti e la loro applicazione al restauro dei manoscritti

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