Calcium Phytate as a Pretreatment for Iron-contaminated Papers Prior to Hydrogen Peroxide Bleaching

Henniges, Ute; Krämer, Maria; Gille, Lars; Brückle, Irene

doi:10.1080/00393630.2020.1826107

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…However, Niehus et al (2012) demonstrate that combining deacidification with iron removal or complexation can provide enhanced stability for papers containing a high level of iron. Henniges et al (2021) successfully masked the metal ions by a phytate treatment prior to bleaching.…”

Section: Bleaching Treatmentsmentioning

confidence: 99%

Archival performance of paper as affected by chemical components: A Review

Hubbe

Maitland²,

Nanjiba

et al. 2023

BioRes

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For about two millennia, paper has served as a main medium for preservation of people’s ideas, stories, contracts, and art. This article reviews what is known about the various components that make up paper from the perspective of their long-term stability under typical storage conditions. Literature evidence is considered relative to the susceptibility of different paper components to embrittlement, acid hydrolysis, microbiological attack, and discoloration, among others. The cellulose that makes up a majority of most paper items is demonstrably stable enough to persist for many hundreds of years on the shelves of archival collections, though it is susceptible to acid-catalyzed hydrolysis, which can be accelerated by byproducts of decomposition. Though less attention has been paid to the archival performance of various minor components of modern paper products, evidence suggests that at least some of them are subject to likely breakdown, embrittlement, or decay in the course of prolonged storage. Based on these considerations, one can envision different categories of paper that can be expected to meet different levels of storage stability: ancient recipes for handmade papermaking, e.g. washi and hanji, archival-grade paper products, ordinary modern alkaline paper products, and paper manufactured without concerns for its longevity.

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Section: Bleaching Treatmentsmentioning

confidence: 99%

Archival performance of paper as affected by chemical components: A Review

Hubbe

Maitland²,

Nanjiba

et al. 2023

BioRes

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“…The results are obtained by accelerated aging at predetermined higher temperatures (usually ranging from 60 °C to 105 °C), time, and relative humidity, and are subsequently extrapolated to normal temperature. Antioxidants, mainly calcium phytate, KI, KSCN, and KBr, have been applied together with deacidification agents [ 46 , 64 , 73 , 74 , 75 , 76 , 77 ]. As measures of the effectivity of the used antioxidants, mechanical properties of paper, prolongation of the expected lifetime, yellowing, and the degree of polymerization have been monitored.…”

Section: Stabilization and Conservation Of Paper Documentsmentioning

confidence: 99%

Stability of Alum-Containing Paper under Alkaline Conditions

Jablonský

Šíma

2020

Molecules

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The present contribution evaluates the methods of degradation and stabilization of alum-containing paper with a focus on the alkaline environment achieved by deacidification procedures. In terms of reviewed subjects, the contribution focuses on alum-rosin sized paper, which is still used as a carrier of knowledge and information; however, it also mentions cellulose itself and other brands of paper. The contribution summarizes the results on the homogeneity of the distribution of alum and rosin in the paper mass and on the paper surface. It provides the knowledge gained in the field of alkaline hydrolysis and oxidation with special regard to transition metal species. It shows the values of alkaline reserves achieved in the main mass-deacidification processes. On the basis of the acquired knowledge, the contribution emphasizes the procedures of paper stabilization. Criteria of “increased mechanical permanence and lifetime prolongation” adopted to evaluate and compare the efficacy of individual mass-deacidification processes were applied and corresponding data are introduced. The contribution also draws attention to the existence of open issues in the area of paper degradation and stabilization.

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“…Hydrogen peroxide (H2O2) is an environmentally friendly and highly reactive oxidant that produces only oxygen and water as by-products during reactions [1] and is widely used in a range of applications, including chemical synthesis [2], wastewater treatment [3], medical disinfection [4], and paper production [5]. In addition, H2O2 can be easily stored and transported as a liquid fuel, which has potential applications in fuel cells for electricity [6,7].…”

Section: Introductionmentioning

confidence: 99%