Sublimable layers for protection of painted pottery during desalination. A comparative study

Sadek, Hamada; Berrie, Barbara H.; Weiss, Richard G.

doi:10.1080/01971360.2018.1537414

“…Samples were dried at room temperature. The dried specimens were then burned at a rate of 5°C/min to achieve the required temperature of 800°C (Vulcan A-550 NEY, Deep Temp 2000 F) (Sadek et al , 2018). Following the formation of the pottery specimens, they were subjected to a succession of salt aging cycles.…”

Section: Methodsmentioning

confidence: 99%

Evaluating nano Primal AC33 for protection and consolidation processes of archaeological pottery: a comparison study with silica and montmorillonite nanoparticles

Mohamed

¹

,

Mohamed

²

2023

PRT

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Purpose This study aims to offer an effective nanocomposite for potential use to consolidate and protect deteriorated archaeological pottery. Design/methodology/approach Three nanocomposites were used in the experimental study. This study used nano Primal AC33, silicon dioxide (SiO2) and montmorillonite (MMT) nanoparticles to protect and consolidate pottery specimens. Pottery specimens were made at 800°C for this investigation. Consolidation materials were applied with a brush. The properties of the treated pottery specimens were assessed using several methods such as digital and scanning electron microscopes, static water contact angle, color alteration, physical properties and compressive strength. Findings Microscopic examination indicated the ability of the nano Primal AC33/MMT nanocomposites to cover the outer surface well and bind the inner granules. Concerning specimens with code F treated with nano Primal AC33 5%/MMT 3% nanocomposites, it achieved an increase in contact angle (120°), density (1.23 g/cm3) and compressive strength (561 kg/cm2), as well as a decrease in color change (ΔE = 2.62), water absorption (4.45%) and porosity (5.46%). The novelty of the results is due to the characteristics of nano Primal AC33 5%/MMT 3% nanocomposites used in the current study. Originality/value This study describes the significant results of the analytical methods used for evaluating consolidation materials used in this study. The findings offer useful information for the protection of archaeological pottery. The investigation indicated that nano Primal AC33 5%/MMT 3% nanocomposites gave the best results. Therefore, it is recommended to use this nanocomposite to consolidate archaeological pottery. As a result, the current work provides a promising first step in conserving archaeological pottery for future studies.

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“…Cyclododecane (CDD) [14][15][16][17][18][19][20][21] and menthol [22][23][24][25] , also referred as "volatile binder media" [23][24] , are mostly used temporary consolidants. In typical applications, the material is melted and applied on the target cultural relics.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it arouses our attention and interest in investigating possible internal stress induced on the artifacts during temporary consolidation practice. Although successful applications of CDD and menthol as consolidant have demonstrated their safety to cultural heritages [14][15][16][17][18][19][20][21][22][23][24][25] , vital information about the internal stress such as generation mechanism, magnitude and distribution, which can be interesting and helpful to conservators, is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

Chen

¹

,

Xu

²

,

Chen

³

et al. 2020

Preprint

0

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Volatile organic solids, such as cyclododecane or menthol, have been employed as temporary reinforcement material during archaeological excavations. They are usually applied as melts and reinforcement is achieved once the melts solidify. Such solidification process can induce internal stress on the artifacts, which can be a big concern, especially to those very precious and fragile ones. However, information about such stress is still extremely limited at present. This paper proposes an experimental method based on resistance strain gauge technique to monitor the deformation induced by solidification of menthol melt. Bending tests are performed on very thin glass slides. The solidification process of menthol melt is well characterized by the development of mechanical strains. Then, menthol melts are applied to three kinds of simulated samples, i.e. glass, sandstone and rice paper, to investigate the mechanical response of preserved bodies upon solidification. It is found that menthol melt will generate certain amount expansion or contraction of the objects upon solidification. The stresses induced, evaluated according to obtained strains, are generally quite small, indicating that application of menthol as reinforcement material is safe in mechanics for cultural relics.

show abstract

“…Recently, on-site temporary consolidation has attracted more and more attention due to its reversibility. Cyclododecane (CDD) [14][15][16][17][18][19][20][21] and menthol [22][23][24][25], also referred as "volatile binder media" [23,24], are mostly used temporary consolidants. In typical applications, the material is melted and applied on the target cultural relics.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, it arouses our attention and interest in investigating possible internal stress induced on the artifacts during temporary consolidation practice. Although successful applications of CDD and menthol as consolidant have demonstrated their safety to cultural heritages [14][15][16][17][18][19][20][21][22][23][24][25], vital information about the internal stress such as generation mechanism, magnitude and distribution, which can be interesting and helpful to conservators, is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

Chen

¹

,

Xu

²

,

Chen

³

et al. 2020

Herit Sci

3

0

View full text Add to dashboard Cite

Volatile organic solids, such as cyclododecane or menthol, have been employed as temporary reinforcement material during archaeological excavations. They are usually applied as melts and reinforcement is achieved once the melts solidify. Such solidification process can induce internal stress on the artifacts, which can be a big concern, especially to those very precious and fragile ones. However, information about such stress is still extremely limited at present. This paper proposes an experimental method based on resistance strain gauge technique to monitor the deformation induced by solidification of menthol melt. Bending tests are performed on very thin glass slides. The solidification process of menthol melt is well characterized by the development of mechanical strains. Then, menthol melts are applied to three kinds of simulated samples, i.e. glass, sandstone and rice paper, to investigate the mechanical response of preserved bodies upon solidification. It is found that menthol melt will generate certain amount expansion or contraction of the objects upon solidification. The stresses induced, evaluated according to obtained strains, are generally quite small, indicating that application of menthol as reinforcement material is safe in mechanics for cultural relics.

show abstract

Sublimable layers for protection of painted pottery during desalination. A comparative study

Cited by 8 publications

References 35 publications

Evaluating nano Primal AC33 for protection and consolidation processes of archaeological pottery: a comparison study with silica and montmorillonite nanoparticles

Evaluating nano Primal AC33 for protection and consolidation processes of archaeological pottery: a comparison study with silica and montmorillonite nanoparticles

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

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