The Restoration of the 'Vienna Dioscorides'

Wachter, O.

doi:10.2307/1505127

Cited by 2 publications

(3 citation statements)

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“…An unseparable 1:2 mixture of the corresponding 5-hydroxy-and 6-hydroxydimethylnorbornane compounds was obtained using different hydroxyl protecting groups (e.g. MEM ether [16], pivaloyl ester [17]. Attempts to remove the MEM group from the corresponding MEM-camphene 8 furnished either 8 again or destroyed the molecule [16].…”

Section: -Acetyl-33-dimethylnorborn-5-ene As Starting Substancementioning

confidence: 99%

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Syntheses in the Isocamphane Series XLII [1]. Synthesis and Odour of 5-exo-Hydroxycamphene (Isonojigiku Alcohol)

Buchbauer

Spreitzer

Köller

et al. 1998

Monatshefte fuer Chemie

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Section: -Acetyl-33-dimethylnorborn-5-ene As Starting Substancementioning

confidence: 99%

“…MEM ether [16], pivaloyl ester [17]. Attempts to remove the MEM group from the corresponding MEM-camphene 8 furnished either 8 again or destroyed the molecule [16]. Also, various attempts to obtain pure 2 and 6 by chromatographical procedures proved to be useless.…”

Section: -Acetyl-33-dimethylnorborn-5-ene As Starting Substancementioning

confidence: 99%

Syntheses in the Isocamphane Series XLII [1]. Synthesis and Odour of 5-exo-Hydroxycamphene (Isonojigiku Alcohol)

Buchbauer

Spreitzer

Köller

et al. 1998

Monatshefte fuer Chemie

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“…If parchment is soiled by mineral or organic substances it is recommended to clean it with water, 19 acid with a slight addition of the antiseptic-nipagin. 30 In cases where there are yellow and brown spots some authors suggest that parchment should be carefully treated with hydrogen peroxide, 21 an aqueous solution of alum or chlorine water 7 followed by careful washing and neutralization of whitening agents. All surface soils in the form of mycelium and spores of fungi, adipose matter and other substances ar^ carefully removed mechanically 7 and then disinfected.…”

Section: Removal Of General Soiling and Pigment Spots From Parchmentsmentioning

confidence: 99%

Conservation and Restoration of Manuscripts and Bindings on Parchment

Yusupova¹

1980

Restaurator

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Parchment is an extremely durable material which has made it possible to preserve early manuscript books and documents (acts, deeds, diplomas, office patents) up to the present time. These materials usually pertain to the most ancient part of a collection and have great scientific, cultural, historic and artistic value.The physical condition and preservation of manuscripts and manuscripts on parchment are, to a large extent, determined by the nature and specific physico-chemical properties of this material. Parchment is untanned leather of special dressing, which possesses some alkalinity. The latter property lends it a certain resistance to the effect of acid components of air and creates a certain protection against microorganisms, which prefer a lightly acid substrate. Nevertheless, its extremely high hygroscopicity substantially diminishes the stability of this material: moisture content in it fluctuates from 10% to 40%, the changes in the relative humidity of the ambient air ranging from 40% to 80%. 9 When preserved in an atmosphere of relative humidity of 40% and less, parchment undergoes deformation and becomes stiff, its surface decreases appreciably and the ink and dyes can fall off. Yet greater deformations and crumbling of leaves are brought about when manuscripts are preserved in conditions of high humidity as parchment is an anisotropic material and adsorbed water spreads unevenly on its surface and in volume. In a bound manuscript, kept in a damp place for some time, the edges of the leaves, which absorb atmospheric humidity most heavily, become so deformed that the edge area increases to a significant degree with the result that it is not always easy to close the book.In this way the most widely spread damages of parchments are different kinds of deformations. This is precisely why the main attention in restoration practice is paid to softening and straightening, i.e. the elimination of deformations.To other frequently encountered damages belong: decay and deterioration of manuscripts, written in acid ferrogallic inks; fading of non-water-resistant and ferrogallic texts; the falling off of texts and colour layer of miniatures; appearance of fragility and transparency; pigment spots of different colour and intensity, different losses, ruptures and cuts. The elimination and prevention of

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The Restoration of the 'Vienna Dioscorides'

Cited by 2 publications

References 0 publications

Syntheses in the Isocamphane Series XLII [1]. Synthesis and Odour of 5-exo-Hydroxycamphene (Isonojigiku Alcohol)

Syntheses in the Isocamphane Series XLII [1]. Synthesis and Odour of 5-exo-Hydroxycamphene (Isonojigiku Alcohol)

Conservation and Restoration of Manuscripts and Bindings on Parchment

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