青海大通县出土汉代玻璃的研究

本文共对12件玻璃样品进行化学组成分析.其中,部分样品还进行了密度测定,X 射线衍射分析和显微镜观察.此外,还对一颗黄色玻璃珠的表面层进行 SEM-EDX 分析.结果表明,该玻璃珠表面有金箔涂层.根据分析结果,青海大通县出土玻璃的基础成分可归为三类,即铅钡玻璃(Na_2O-PbO-BaO-SiO_2系统玻璃),钠钙玻璃和钾硅玻璃(K_2O-SiO_2系统)。此外,还对玻璃的来源进行了探讨.     

Transitions in Islamic plant-ash glass vessels: on-site chemical analyses conducted at the Raya/al-Tur area on the Sinai Peninsula in Egypt

This study focuses on the chemical composition of Islamic plant-ash glass (dated from the 9th to 11th centuries) excavated from the Raya/al-Tur area on the South Sinai in Egypt. Plant-ash glass objects from the Raya site were classified into three compositional types based on on-site chemical analyses with a portable X-ray fluorescence spectrometer. Based on typological characteristics and chemical composition comparisons with contemporary glass objects from other Islamic sites, one hypothesis holds that plant-ash glass objects produced in the Syria–Palestine or Mesopotamian regions could have been imported to Raya during the 9th to 10th centuries. In particular, some colorless glass vessels with a high magnesium/calcium ratio were noted to exhibit post-Sassanian cut decorations. Conversely, most of the bluish-green plant-ash glass objects from the Monastery of Wadi al-Tur near the Raya site exhibited relatively high levels of aluminum, titanium, iron, and lead. These pieces were likely produced during the Fatimid period (late 10th to 12th centuries), and based on their elemental composition, possibly originated in Egypt. The present work provides a greater understanding of chronological changes in post-9th century Islamic plant-ash glasses and the development of social and commercial networks within the Middle Eastern area.     

Overseas imports on the Blue Nile: Chemical compositional analysis of glass beads from Soba,Nubia

Archaeological evidence as well as textual sources leave no doubt about Alwa's (Alodia's) intense transcultural connections, further corroborated by understudied overseas glass bead imports found there. This paper presents results of an analysis of 23 glass beads from Soba, the most prosperous capital of medieval Nubia. Compositional analyses using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) have identified glass belonging to a number of broad compositional groups. Three samples were made of soda lime low-alumina glass produced in the Middle East (v-Na-Ca) and Egypt (m/v-Na-Ca). The remaining beads were made of two types of mineral–soda high-alumina glass (m-Na-Al) North Indian in origin. The results of this study provide new evidence for the provenance and chronology of glass beads available in medieval Soba and Northeast Africa, and contribute new data to research on trade contacts of that time.     

A geochemical study of Roman to early Byzantine Glass from Sagalassos,South-west Turkey

The finding of glass chunks together with fuel ash slag and kiln fragments related to glass processing strongly suggests local secondary production (working) of glass at Sagalassos (SW Turkey) from imperial to early Byzantine times. Chemical evidence shows that different silica raw materials were used in imperial and early Byzantine times for blue and green glass found locally. Colourless glass shows no clear difference in chemical composition and hence in silica raw materials between late Roman and early Byzantine times. Locally found early Byzantine yellow-green glass and chunks correspond to the previously defined Byzantine HIMT glass type. The chemical composition of the glass chunks found, identical to that of the contemporary glass of the same colour, strongly indicates that these chunks were used for the manufacture of early Byzantine green, colourless and yellow-green glass at Sagalassos.The homogenous lead isotopic composition of the chronological groups of blue glass, suggests the use of two distinct but homogenous silica raw materials for the manufacture of this glass. In view of this homogeneity, it is likely that contemporary blue glass was produced at a single location. The linear trend of the heterogeneous lead isotopic composition of the green and colourless glass is a strong indication of recycling effects in the glass composition. The end members of this trend are formed by the isotopic composition of the blue glass on the one hand, and of the yellow-green (HIMT) glass on the other hand. The heterogeneous lead isotopic composition of the yellow-green glass at Sagalassos is probably the result of recycling of this glass, reflecting mixtures of the original lead isotopic signatures of the broken glass and the original HIMT glass chunks.It should be noted that the two main raw materials for primary glass production (silica and soda) were available on the territory of Sagalassos. Moreover, the lead isotopic composition of quartz pebbles sampled from the artisanal quarter of Sagalassos, is similar to that of the local blue glass.     

Glass on the Amber Road: the chemical composition of glass beads from the Bronze Age in Poland

The article discusses the chemical composition of 56 glass samples from 52 beads found in Poland at 13 archaeological sites (mainly cemeteries). The artefacts have been dated to the II–V period of the Bronze Age (=phases BzB–HaB; c. 1600–750/700 bc). The LA-ICP-MS method was applied. Two groups were distinguished in this assemblage based on a comparison of the MgO to K₂O ratio in glass: (i) high magnesium glass (HMG)—23; and (ii) low magnesium and high potassium glass (LMHK)—33 (29 matrix glass specimens and 4 decorative). In southern Poland, beads made of HMG and LMHK are often found in the same cemeteries. Analyses have shown that HMG was most probably made in Mesopotamia and that at least one cobalt glass is of Egyptian provenance. LMHK glass was made in Europe, most probably in Italy. Also, Italy was the most probable transit point for artefacts made of HMG en route to East-Central Europe.     

THE RAW MATERIALS OF EARLY GLASS PRODUCTION

This paper discusses raw materials used in ancient glasses. Following a consideration of some archaeological reasons for studying glass, the discussion concentrates on the evidence provided by chemical analysis of the glass, and focuses on glass from later prehistoric Western Europe. Consideration of the major, minor and trace components of the glass leads to a conclusion that prehistoric glass artisans were able closely to control the addition of small quantities of colorants, opacifiers and clarifiers to the glass melt. Some possible ways of introducing such small quantities of these substances are suggested. A related implication is that glass production in prehistoric Europe was a mainly specialist industry, being part of a 'high-status'socio-economic sphere. When interpreting technical analyses a full consideration of the socio-economic niche occupied by the glass industry is urged.     

Evidence for glass ‘recycling’ using Pb and Sr isotopic ratios and Sr-mixing lines: the case of early Byzantine Sagalassos

The secondary production (working) of glass from imperial to early Byzantine times has been proven at the ancient city of Sagalassos (SW Turkey) by the existence of glass chunks, fuel ash slag and kiln fragments related to glass processing. It had been previously suggested that local green glass might have been recycled from two other locally found glass types (blue glass vessels and chunks and HIMT glass chunks). This paper provides analytical evidence for the recycling of glass next to the use of imported raw glass. The heterogeneous lead isotopic composition of the green and HIMT vessel glass at Sagalassos, with as end members on the one hand the isotopic composition of local blue glass vessels and chunks and on the other hand that of the HIMT glass chunks, could indicate the production of ‘recycled’ glass, although heterogeneous raw materials could have been used. However, the use of Sr-mixing lines confirms local recycling. It is clear that the Sr in the green and HIMT vessels is a mixture of the Sr in the aforementioned end members. It cannot be proved whether the green ‘recycled’ glass was produced from a mixture of chunks alone, or from a mixture of cullet and chunks. Suggestions are made towards the possible origin of the raw materials for the blue and HIMT glass on the basis of Sr isotopic signatures and absolute Sr contents in the glass.     

The glass of Nogara (Verona): a “window” on production technology of mid-Medieval times in Northern Italy

The site of Nogara (province of Verona, Italy) provides valuable insights into the complexities of the glass industry in mid-Medieval times, due to its timing, which ranges mainly between the 10th and 11th centuries AD, and to the great quantity of glass findings, mainly tableware. In the present paper, the combination of archaeological, chemical and textural data allows us to identify production technologies in a time-interval perceived to be a period of technological transition for glass. In particular, the frequent occurrence of recycled natron glass and only a few glass samples made with soda plant ash indicate that recycling of earlier glass was common in inland Northern Italy in the 10th–11th centuries AD. In addition, blue and reticello decorations were obtained by recycling earlier glass mosaic tesserae, as shown by much Co, Cu, Sn, Sb and Pb and the presence of crystallised calcium antimonates. A few glass samples with chemical compositions intermediate between natron and soda plant ash glass were also identified, suggesting a gradual change in glass composition from natron-based towards soda ash-based production technology, which prevailed in the 13th-14th centuries. In conclusion, the difficulty in describing mid-Medieval glass as a well-defined entity, due to the great propensity for recycling earlier glass samples which causes variability in chemical compositions, particularly those of trace elements, is clearly documented here. In any case, this paper contributes to a new type of chrono-typological scanning and to more detailed knowledge of glass production technology during mid-Medieval times in Northern Italy, little found in the literature until now.     

两件秦代铅钡玻璃腐蚀特征研究

铅钡玻璃是我国特有的玻璃体系，主要集中在战国至两汉时期。随着越来越多的铅钡玻璃完整器被发现，相关的风化腐蚀研究和保护工作逐渐展开。本研究以陕西临潼新丰秦墓和河南三门峡秦墓出土的两件秦代(公元前221—公元前207)铅钡玻璃为样本，采用光学显微镜、扫描电子显微镜、激光拉曼光谱仪对铅钡玻璃的腐蚀层进行成分与结构分析，结果表明铅钡玻璃腐蚀层的钡大部分流失至环境或腐蚀层外侧，腐蚀层的主要物相为碳酸铅。腐蚀层的形成与铅钡玻璃埋藏环境中水位和酸碱度的周期性变化有关。本研究对铅钡玻璃保护工作具有参考价值，也为古代玻璃文物的预防性保护提供了有益的信息。     

The Analysis of Late Bronze Age Glass from Nuzi and the Question of the Origin of Glass‐Making

This paper re‐analyses a considerable corpus of glass from the Late Bronze Age site of Nuzi, found near Kirkuk in Iraq. SEM–WDS and Sr and Nd isotopic analysis were applied, in addition to cataloguing the glass. The work showed that the glass technology at Nuzi was subtly different from contemporary Egyptian sites, using different ways of opacifying and working glass. At least two, perhaps three, Near Eastern production sites are postulated. The range of glass colours and the skill of their application at Nuzi was perhaps not on a par with the Egyptian sites. This led to a reconsideration and review of the accepted wisdom that the Near East is the source of the innovation that is glass‐making. This opinion is based on limited textual and iconographic sources and is dominated by an erroneous early date for a very developed Nuzi glass industry along with a few finds of glass vessels in early contexts. Some of this evidence has now been at least questioned, suggesting that glass‐making in Egypt, at least as early as the middle of the 15th century bc , and probably earlier, is no later than that in the Near East. It is argued that it is far from clear that the Near East was the source of the innovation and that a more cautious approach would better fit the evidence.     

枣阳郭家庙曾国墓地出土石英珠的初步研究

本文分析讨论了枣阳郭家庙曾国墓地出土的石英珠的化学成份和制造工艺,探讨了其制造工艺与楚国玻璃制造工艺之间的关系,认为至迟在西周晚期,随枣走廊一带的工匠们已经掌握了石英珠的制造技术,对后来楚国玻璃制造业的兴起,起到了直接重要的作用。     

The Archaeometry and Archaeology of Ancient Chinese Glass: a Review

This paper provides a new review of archaeometric research carried out on glass found in China, set in an archaeological context, from its earliest occurrence to the Song dynasty. It is set within a broad geographical context taking the terrestrial and maritime Silk Road contacts into account. We discuss chemical and isotopic compositional contrasts in glasses from different periods found in different parts of China, the glasses that were almost certainly made in China and those that were imported. A theme that runs through the paper is the problem of provenancing glass found in China, along with a lack of evidence for primary glass‐making sites and minimal evidence for secondary glass production. We discuss the glass artefacts that are of typical Chinese types and contrast these with imports; the structure reflects this contrast. We discuss potential new scientific and archaeological approaches to Chinese glass.     

Tesserae Recycling in the Production of Medieval Blue Window Glass

The purpose of this paper is to develop a means of quantifying glass recycling and to discuss the ‘anachronistic’ chemical composition of medieval blue window glass. This method relies on a new numerical method using kernel density estimates and is based on a database of published glass chemical compositions. It seeks to reveal when, to what extent and why blue tesserae were recycled for the production of French and English blue glass. First, it is suggested that blue glass had an ‘anachronistic’ chemical composition only before the 13th century. Second, the ‘anachronistic’ chemical composition of 12th‐century blue glass comes from the recycling of both blue tesserae and non‐coloured glass. Finally, this recycling was motivated by the scarcity of cobalt sources until mines were found in the 13th century.     

A Sod Lime Kiln on Cefn Bryn,Gower, West Glamorgan

Abstract

The surviving half of a winged glass furnace was excavated at Savenel, south of Louvain (Belgium). Coins, glass and pottery suggested operation early in the 17th century, and archives confirm the presence in the locality of the Colnets, a family of glass makers at that time. The furnace is paralleled by excavated examples in England.     

Beads from a mediaeval pilgrim centre: Chemical composition and provenance of glass from Banganarti,Nubia, Sudan

Christian Nubia was a region with intensive transcultural connections that are visible through the understudied overseas glass bead imports found there. This paper presents the results of an analysis of 20 glass beads from Banganarti, a Christian pilgrim site active during the Makuria kingdom (mid-sixth to 14th centuries CE). Compositional analyses using laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) have identified glass belonging to a number of broad compositional groups. Two beads were made of mineral soda-lime glass, dated before the mid-ninth century CE. Numerous beads were made from plant ash-soda-lime glass associated with “Mesopotamian” production dated between the eighth and 10th centuries CE. Lead-soda-silica glass has parallels in the ninth–10th centuries glass found in Africa and Europe. One plant ash-soda-lime bead was of eastern Mediterranean origin dated after the 10th century CE. Results of this study provide new evidence for provenance and chronology of glass beads available in the mediaeval Northeast Africa as well as contribute new data to the research on the pilgrim and/or trade routes of that time.     

RAW MATERIALS OF GLASS FROM AMARNA AND IMPLICATIONS FOR THE ORIGINS OF EGYPTIAN GLASS*

Analysis has been conducted on 19 blue glasses from Amarna in Middle Egypt dated to around 1350 BC. The results suggest that these glasses fall into two distinct types: cobalt coloured glasses with a natron based alkali made from local Egyptian materials, and copper coloured glasses with a plant ash alkali, which follow a Mesopotamian tradition of glass making. It is suggested that at least some of this copper/plant ash glass is imported into Egypt during the Amarna period despite extensive local production of cobalt/natron glass. Existing analyses (Lilyquist and Brill 1995) of the earliest glass from the reign of Tuthmosis III (c. 1450 BC) suggest that during this period the same two types of glass are present. Local Egyptian cobalt and natron in these early glasses implies that, despite the lack of archaeological evidence for production sites, glass was produced from its raw materials in Egypt as early as the reign of Tuthmosis III.     

故宫藏清代挂屏镶嵌玻璃饰件的科学分析

清代镶嵌器物数量巨大且种类繁多,玻璃是其中一种重要的镶嵌材料。为探讨清代镶嵌玻璃饰件的成分特征和加工工艺,本工作采用微区X射线荧光能谱、扫描电子显微镜、显微共聚焦拉曼光谱、激光诱导击穿光谱等方法,对故宫馆藏清代紫檀木边嵌玉石楼阁挂屏上的6件镶嵌玻璃饰件进行了初步分析,结果表明:6件玻璃饰件属于K₂O-CaO-SiO₂体系,以石英岩引入SiO₂作玻璃基体,硝石作助熔剂引入K₂O,CaO有方解石和萤石两个主要来源;深蓝色玻璃着色元素为钴,浅蓝色玻璃着色元素为铜,蓝绿色玻璃为铜和铁共同着色,4件玻璃饰件乳浊剂均为CaF₂;黄色玻璃以铅锡黄为着色剂并乳浊剂。通过显微形貌观察结合档案记载,认为镶嵌玻璃饰件是在熔制好的玻璃块上经过二次加工而成,加工工艺采用了中国古代传统的治玉工艺。研究结果可为清代镶嵌工艺及玻璃制作工艺的研究提供佐证。     

Notes on the Manufacture of Porcelain at Chelsea

A furnace built in 1618 by Abraham Bigo and Sir William Clavell for the manufacture of window glass was excavated at Kimmeridge, Purbeck, Dorset (SY 909788) in 1980–81. Local oil-shale was used as a fuel in the furnace, whose central fire was fed with air by means of two passages below ground level, as found at other seventeenth-century furnaces and indicated in contemporary sources. The above-ground structure comprised sieges and wings whose plan resembled those of sixteenth-century forest-glass furnaces. Vessel glass was produced at Kimmeridge in traditional forms for sale in the south-western counties, by agreement with Sir Robert Mansell, patentee of the monopoly for glass manufacture. Trade beyond the designated area led to legal action which resulted in the demolition of the furnace in 1623. The excavation showed that the product of the furnace was green vessel glass of good durability, melted in crucibles made from high-quality refractory clay derived from Purbeck sources.     

Change in chemical composition of early Islamic glass excavated in Raya,Sinai Peninsula,Egypt: on-site analyses using a portable X-ray fluorescence spectrometer

The Raya port (eighth to 12th centuries) on the Sinai Peninsula, Egypt, was one of the important port cities for the Red Sea trade. We performed on-site analyses of Islamic glass vessels (used in eighth to 11th centuries) mainly from this site in Egypt using a portable XRF spectrometer. The aim of this paper is to contribute to our understanding of the chemical compositions of early Islamic glass vessels by comparing their archaeological date and typology. In the early Islamic period, glass objects were mainly produced from natron as the soda source. Among the natron glass analyzed in this study, glass vessels with low titanium and iron and high strontium contents, which were probably produced in the Syria–Palestine region, were excavated in the eighth century layer. From the ninth century layer, a large number of samples with high levels of calcium, titanium and iron, probably produced in Egypt, were found. It should be noted that a large number of glass vessels with this chemical composition were found at the Raya site, because this type of glass was rarely reported from other Islamic sites. We finally concluded that this type of glass seems to be produced under a fixed recipe, although some samples contain a colorant or decolorized materials.