Archaeological glass conservation and restoration intervention materials – a literature review

Conservation and restoration on archaeological objects in glass often involve the removal of materials from previous restorations and comprise a deep knowledge about present and past methodologies. This article presents a literature survey and critical analysis of the main materials used in the different stages of intervention: cleaning, consolidation, joining fragments and filling gaps. A considerable number of used products was identified, which illustrates the use of various methodologies among professionals from this area. Cleaning methods vary from mechanical methods using a brush (less invasive) to the use of various acidic solutions, some of which can endanger the integrity of objects, being the most common ethylenediamine tetra-acetic acid. We highlight the use of epoxy resins as adhesive, consolidant and filler, as well as the acrylic resin Paraloid B-72, identified as reversible, colorless, stable and inert. This survey and analysis of the bibliography reveals the need to implement common intervention methodologies dedicated to this material.

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Development of the New Generation Materials for the Soft Pipe Lining Rehabilitation

Volume 5: High Pressure Technology, Nondestructive Evaluation, Pipeline Systems, Student Paper Competition ◽

10.1115/pvp2005-71055 ◽

2005 ◽

Author(s):

Hsin Her Yu ◽

Min-Hsun Cheng ◽

Rong-Yuan Jou ◽

Kuang-Chyi Lee ◽

Chien-Chang Lin

Keyword(s):

Mechanical Properties ◽

Epoxy Resins ◽

Potable Water ◽

Raw Materials ◽

Trade Mark ◽

Power Cables ◽

Different Types ◽

Materials Used ◽

New Generation ◽

Optimum Sample

With increasing global urbanization and industrialization, many more pipelines for gas, potable water, sewer, oil, and power cables have been installed underground, underwater, in buildings and in factories. Maintenance of such pipelines is crucial. However, it is often difficult and has become a growing problem these days. The PALTEM-HL (Trade mark and stands for Pipeline Automatic Lining SysTEM, Hose Lining Method), a pipeline relining system, was developed as an effective and inexpensive solution for this problem. In this project, we try to develop a new resins and the adhesives system to replace the raw materials used in the PALTEM-HL system. Anionic harder combined two different types of epoxy resins were investigated in this study. After curing, the mechanical properties and glass transition temperature of the mixture were examined and the optimum sample preparation prescription was also found. FTIR (Fourier Transform Infrared Spectroscopy) and DSC (Differential Scanning Calorimeter) were employed to monitor the curing process of the mixtures. The mechanical properties of the mixture were also measured by Instron and micro Vickers.

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Cytotoxicity of acrylic resin-based materials used to fabricate interim crowns

Journal of Prosthetic Dentistry ◽

10.1016/j.prosdent.2020.01.030 ◽

2020 ◽

Vol 124 (1) ◽

pp. 122.e1-122.e9 ◽

Cited By ~ 1

Author(s):

Isabela R. Souza ◽

Taisa N. Pansani ◽

Fernanda G. Basso ◽

Josimeri Hebling ◽

Carlos A. de Souza Costa

Keyword(s):

Acrylic Resin ◽

Materials Used

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Considerations on determining the castability of dental casting alloys

MATEC Web of Conferences ◽

10.1051/matecconf/201817804009 ◽

2018 ◽

Vol 178 ◽

pp. 04009

Author(s):

Cristian Deac ◽

Alina Gligor ◽

Lucian Tarnu

Keyword(s):

Titanium Alloy ◽

Critical Analysis ◽

Casting Machine ◽

Current Paper ◽

Metallic Materials ◽

Dental Alloys ◽

Casting Alloys ◽

And Performance ◽

Materials Used ◽

Dental Casting Alloys

Castability is, along with biocompatibility, one of the most important characteristics of metallic materials used for dental prosthetic applications. In addition, the characteristics and performance of the employed casting machine are also decisive for the end result of the casting, especially when dealing with titanium or a titanium alloy. Starting from a critical analysis of the existing methods for determining the castability of dental alloys, the current paper presents a new method (and associated pattern) for determining the castability. Also, given the castability’s dependence on the type of casting machine, the paper includes an analysis of suitable casting machines and suggests some possible improvements.

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JUMLAH KOLONI CANDIDA ALBICANS PADA PLAT RESIN AKRILIK HEAT CURED SETELAH DILAKUKAN PERENDAMAN EKSTRAK DAUN KEMANGI (OCIMUM BASSILICUM LINN) 50%

Interdental Jurnal Kedokteran Gigi (IJKG) ◽

10.46862/interdental.v16i2.1126 ◽

2020 ◽

Vol 16 (2) ◽

pp. 61-63

Author(s):

Kadek Ayu Wirayuni ◽

◽

Sintha Nugrahini

Keyword(s):

Candida Albicans ◽

Leaf Extract ◽

Acrylic Resin ◽

The Body ◽

Control Group ◽

Control Group Design ◽

Denture Stomatitis ◽

Parametric Test ◽

Group Design ◽

Cleaning Methods

Accumulation of plaque and food scraps on an acrylic resin base will increase bacterial colonies and C. albicans which will cause denture stomatitis. Maintenance of denture hygiene using mechanical, chemical and combination of two methods. Basil leaf extract contain essential oils which are important in fight against resistant C. albicans biofilms. The purpose of this study was to determine the comparison of C. albicans colonies after cleaning various denture cleaning methods. The method of this study is used an experimental method, the study design is posttest only with control group design. Sample size of heat-cured acrylic resin plate is 40x12x3mm. this study use Kruskall-Wallis test and Mann-Whitney test as data analysis for comparison tests between groups (non-parametric test). The results showed that there were significant differences between the various cleansing methods used in reducing C. albicans colonies. The compotition of flavonoids basil leaf extract is anti-microbial which can prevent the entry of fungi that harm the body.

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Study of Adaptive-Reuse Application in Rumah Atsiri (Ex. Citronella Factory), Karanganyar

PROCEEDING INTERNATIONAL CONFERENCE ON ENGINEERING ◽

10.36728/icone.v1i1.1270 ◽

2020 ◽

Vol 1 (1) ◽

pp. 49-55

Author(s):

Febrione Putri Rakhmanty ◽

Eny Krisnawati

Keyword(s):

Field Survey ◽

Adaptive Reuse ◽

Literature Survey ◽

Modern Architecture ◽

Original Function ◽

Materials Used ◽

Factory Building

Abandoned and unused old buildings are often seen as a waste of land. One of the ways that old buildings can be reused is to use the adaptive-reuse concept, which is an attempt to reuse an old, unused building into a different function from the original function while maintaining the original building values. The purpose of this research is to understand how the Adaptive Reuse concept is applied in Rumah Atsiri Indonesia. Firstly, the data has been collected through literature survey and field survey. Then, analyzed the elements of Rumah Atsiri Indonesia that can be categorized as adaptive reuse examples and have been investigated in the light of the de?ned factors. At the end, according to the result we can find what kind of work that has been done in Rumah Atsiri Indonesia that makes it as a sample of adaptive reuse projects. Rumah Atsiri that we see today is the result of the revitalization of an old factory building with a touch of modern architecture. Revitalization is carried out while maintaining the authenticity of the design of the building. The contrass of materials makes visitors able to distinguish which of the old buildings and which buildings and new elements are added by looking at the materials used.

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Construction Materials for Adhesive Bonding in Present-Day Industry

Using Lasers as Safe Alternatives for Adhesive Bonding - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-7998-4634-5.ch002 ◽

2020 ◽

pp. 26-57

Keyword(s):

Technological Process ◽

Epoxy Resins ◽

Chemical Structure ◽

Adhesive Bonding ◽

Construction Materials ◽

Engineering Industry ◽

Light Alloys ◽

Materials Used ◽

Modern Industry

This chapter presents the characteristics of selected construction materials used in the modern industry, with particular attention paid to the engineering industry. These materials have a diverse chemical structure and related properties. In this context, steels, selected light alloys, plastics, wood, glass, and ceramics were described. Since the materials for production are supplied in various forms, the methods of shaping the semi-finished products of the presented materials were outlined. Special attention was given to the condition of the surface and the shape due to the possible bonding operations in the technological process. Additionally, a description of composites was given, as these materials have already replaced a number of materials used so far. Composites are characterized by having favorable features and are produced with the use epoxy resins, among others. This chapter also outlines the characteristics of adhesives in the context of their selection options for the glued materials.

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Investigating the Potential of the Er:YAG Laser for the Removal of Cemented Dust from Limestone and Painted Plaster

Coatings ◽

10.3390/coatings10111099 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1099

Author(s):

Lucia Noor Melita ◽

Katarzyna Węgłowska ◽

Diego Tamburini ◽

Capucine Korenberg

Keyword(s):

Er:Yag Laser ◽

British Museum ◽

Gas Chromatography Mass Spectrometry ◽

Cleaning Process ◽

Pyrolysis Gas ◽

Small Areas ◽

Conservation Treatment ◽

Materials Used ◽

Cleaning Methods ◽

The Right

A successful application of Er:YAG laser for the cleaning of a restored Assyrian relief sculpture from the British Museum collection is presented. Displayed in the gallery, the sculpture has darkened over time due to the natural deposition of dirt, in particular on restored parts. Since traditional cleaning methods have demonstrated to be unsuccessful, a scientific investigation was performed to identify the composition of the soiling and the materials used for the restoration. The analysis suggested the presence of gypsum, calcium oxalate, carbonates and alumino-silicates on the encrustation. The molded plaster, composed of lime and gypsum and pigmented aggregates, was likely prepared at the end of the 19th century to mimic the stone color. It was repainted with what was identified as a modern oil-based overpaint, applied to cover darkening during a second conservation treatment in the 20th century. Laser trials were first performed on small areas of the objects and on mock-ups to determine the critical fluence thresholds of the surface, investigated through visual examination and analyses using Fourier transform infrared spectroscopy (FTIR) and Pyrolysis-gas chromatography-mass spectrometry (Py–GC–MS). The right parameters and conditions to be used during the cleaning process were, therefore, determined. The chemical selectivity of the cleaning process allowed us to complete the treatment safely while preserving the restoration.

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The comparison of color stability between thermoplastic nylon resin and heat-cured acrylic resin after tea-soaking using spectrophotometer

Padjadjaran Journal of Dentistry ◽

10.24198/pjd.vol21no3.14107 ◽

2009 ◽

Vol 21 (3) ◽

Author(s):

Lisa Putri Lestari ◽

Kosterman Usri ◽

Renny Febrida

Keyword(s):

Base Material ◽

Color Stability ◽

Acrylic Resin ◽

Colour Stability ◽

Thermoplastic Resin ◽

Denture Base ◽

Material Requirement ◽

System Data ◽

Materials Used ◽

Tea Drinking

Color stability is one of the denture base material requirement. Nowadays, nylon thermoplastic resin and heat-cured acrylic resin which is used as denture base materials can be changed in colour. One of a colour-changed factor is the tea drinking habit. The objective of this research was to compare the colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea. Materials used for the research were nylon thermoplastic resin from Valplast and heat-cured acrylic resin QC-20, with a sample size of 64x(10±0.03)x(2.5±0.03)mm. The sample would be assessed of colour stability after the denture base soaked in tea for 7 days. The colour measurement of each sample was done by spectrophotometer equipment (CIE lab system). Data gathered later on statistically processed with ANOVA testing. The result showed that the comparison ratio of colour stability between nylon thermoplastic resin and heat-cured acrylic resin after soaked in tea was 1.9886:1.1152. The conclusion was that colour stability in the nylon thermoplastic resin was lower than heat-cured acrylic resin after soaked in tea. This result was due to a polymer chain of nylon thermoplastic which was lower than heat-cured acrylic resin and its porosity which was higher, so tea easily soaked into the materials.

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