51 research outputs found
Identification, Geochemical Characterisation and Significance of Bitumen among the Grave Goods of the 7th Century Mound 1 Ship-Burial at Sutton Hoo (Suffolk, UK)
Acknowledgments: We would like to thank Antony Simpson for formatting the figures for publication. We are indebted to Dr Sonja Marzinzik and Dr Sue Brunning, former and current curators of the Department of Britain, Europe and Prehistory at the British Museum, for facilitating access to the Sutton Hoo finds. Carbon and hydrogen isotopic measurements were carried out by Iso-Analytical Limited. We are grateful to colleagues and others who read and commented on the manuscript in draft. Funding: This research was supported by funding from the European Commission Research Executive Agency (REA) via the Marie Curie Actions â Intra-European Fellowships for Career Development funding scheme (FP7-MC-IEF), Grant Agreement No. 253942, awarded to PB and RJS for project AMPT (Ancient Maritime Pitch and Tar: a multi-disciplinary study of sources, technology and preservation). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Peer reviewedPublisher PD
Heritage science contribution to the understanding of meaningful khipu colours
Funding: Financial support by the Access to Research Infrastructures activity in the Horizon 2020 Programme of the EU (IPERION HS Grant Agreement n.871034) is gratefully acknowledged.This work is the first scientific study of khipu dyes and inorganic mordants and auxiliaries, paving the way for a new approach to understanding khipusâ meaningful materiality, technology, and colours. Khipus have usually been described as âAndean knotted recordsâ, but they are much more than complex knotted cords: a great part of the information encoded resides in khipusâ incredible colours. The objects of this study are two Wari khipus, 1932.08.0001 and 1932.08.0002, now at the Museum of World Culture in Gothenburg, Sweden. After a morphological study of the khipus, the objects were imaged with multiband imaging (MBI) as an aid for the sampling decisional process. The khipus were then analysed non-invasively by X-ray fluorescence (XRF) spectroscopy on selected areas of particular interest. The khipus were consequently sampled for elemental characterisation by micro-XRF, and liquid chromatography coupled with high-resolution mass spectrometry (HPLCâHRMS) for characterising the organic dye composition. This paper presents a part of the results of the project âMeaningful materials in the khipu codeâ, with the intent to shed light on the difficulties and possibilities of investigating khipu colours and dyestuffs. MBI and XRF revealed unforeseeable structural characteristics, such as remnants from a heavily degraded thread in an area of missing thread wrapping and a dual-coloured thread that was previously deemed single-coloured. The organic dyes identified by HPLCâHRMS comprised indigoids, cochineal, and an unknown flavonoid-based dyestuff. XRF of the inorganic components revealed associations of several elements with specific colours.Publisher PDFPeer reviewe
FÀrgundersökningar av Fossesholms herrgÄrds blocktryckta tapeter : dokumentation av gÀstkollegeprojekt : analysrapport frÄn RiksantikvarieÀmbetet
GÀstkollegeprojektet genomfördes som en workshop dÀr syfte var att öka deltagarens kunskap om att preparera prover och genomföra fÀrgundersökningar genom polarisationsmikroskopi och svepelektronmikroskopi samt grundÀmnesanalys. Fossesholms herrgÄrds blocktryckta tapeter anvÀndes som en fallstudie. Utöver de metoder som ingick i workshoppen anvÀndes FTIR för att undersöker bindemedel
Undersökning av ett textilfragment frÄn Vasamuseets samling : dokumentation av gÀstkollegeprojekt
I detta gÀstkollegeprojekt undersöktes ett vÀvt textilfragment med blÄ bemÄlning som hittats pÄ övre batteridÀck av skeppet Vasa. FrÄgestÀllningen var om fragmentet var original frÄn skeppet Vasas tid och om det kunde vara en del av en fana. Undersökningarna visade att textilfragmentet Àr en sidensatÀng bestÄende av bÄde degummerat silke och rÄsilke, samt att bemÄlningen innehÄller pigmenten bariumsulfat och preussisk blÄ som fanns inte pÄ skeppet Vasas tid. Resultaten pekar pÄ att textilfragmentet Àr minst ett Ärhundrade yngre Àn skeppet, kanske Ànnu yngre
Production and validation of model iron-tannate dyed textiles for use as historic textile substitutes in stabilisation treatment studies
BACKGROUND: For millennia, iron-tannate dyes have been used to colour ceremonial and domestic objects shades of black, grey, or brown. Surviving iron-tannate dyed objects are part of our cultural heritage but their existence is threatened by the dye itself which can accelerate oxidation and acid hydrolysis of the substrate. This causes many iron-tannate dyed textiles to discolour and decrease in tensile strength and flexibility at a faster rate than equivalent undyed textiles. The current lack of suitable stabilisation treatments means that many historic iron-tannate dyed objects are rapidly crumbling to dust with the knowledge and value they hold being lost forever. This paper describes the production, characterisation, and validation of model iron-tannate dyed textiles as substitutes for historic iron-tannate dyed textiles in the development of stabilisation treatments. Spectrophotometry, surface pH, tensile testing, SEM-EDX, and XRF have been used to characterise the model textiles. RESULTS: On application to textiles, the model dyes imparted mid to dark blue-grey colouration, an immediate tensile strength loss of the textiles and an increase in surface acidity. The dyes introduced significant quantities of iron into the textiles which was distributed in the exterior and interior of the cotton, abaca, and silk fibres but only in the exterior of the wool fibres. As seen with historic iron-tannate dyed objects, the dyed cotton, abaca, and silk textiles lost tensile strength faster and more significantly than undyed equivalents during accelerated thermal ageing and all of the dyed model textiles, most notably the cotton, discoloured more than the undyed equivalents on ageing. CONCLUSIONS: The abaca, cotton, and silk model textiles are judged to be suitable for use as substitutes for cultural heritage materials in the testing of stabilisation treatments
Undersökningar av Paracastextilier : dokumentation av gÀstkollegeprojekt
Syftet med projektet var att undersöka och jÀmföra bevarandestatusen pÄ Paracastextilier som förvarats i olika museimiljöer, i Sverige och i Peru, för att studera pÄverkan av ammoniakbehandlingen som utfördes pÄ 1990-talet och att jÀmföra resultaten med de erhÄllna under tidigare undersökningar frÄn 1990-talet och framÄt. Dessutom var förhoppningen att utredningarna skulle kunna öka vÄr kunskap om det betningsmedel som anvÀndes i dessa gamla textiler, eftersom det fortfarande finns ett kunskapsgap om fÀrgsystemen som anvÀnds av de antika andinska kulturerna.
Workshop : characterisation of plant fibres from New Zealand: Documentation of a guest colleague projectat the Swedish National Heritage Board
PĂ„ VĂ€rldskulturmuseerna finns en samling som Sir Joseph Banks tog med sig frĂ„n kapten James Cooks första expedition 1768â1771. Denna samling inbegriper bland annat en sĂ€llsynt maorimantel, ID 1848.01.0064. Catherine Smith, University of Otago i Nya Zeeland, hörde av sig till museet med en förfrĂ„gan om ett materialprov frĂ„n denna maorimantel. Catherine Smith informerade museet om att den hĂ€r manteln Ă€r en av sjubevarade maorimantlar i museisamlingar, som tillverkats med RĂŁrangatekniken. I sin forskning försöker hon visa pĂ„ en koppling mellanpolynesiska migranter till Nya Zeeland (de första nybyggarna) och detekniker som anvĂ€ndes för att tillverka mantlarna.The ethnographic museum of the Museums of World Culture has a collection that Sir Joseph Banks brought back from Captain James Cookâs first expedition 1768â1771. This collection includes a rare Maori cape, ID1848.01.0064, for which the museum received a sample request from Catherine Smith of the University of Otago in New Zealand. Catherine Smith informed the museum that this cape is one of seven surviving Maori capes made using the RĂŁranga technique in museumcollections. In her research, she is trying to show a link between Polynesianmigrants to New Zealand (the first settlers) and the techniques used to makethe capes
Undersökningar pÄ fiberprover frÄn Paracastextilier : dokumentation av gÀstkollegeprojekt
Detta gÀstkollegeprojekt bygger vidare pÄ tidigare undersökningar av Paracastextilier. En viktig frÄgestÀllning var att utreda om den behandling med ammoniakgas som anvÀndes under 1990-talet pÄverkade fibrernas nedbrytningsgrad. Det utökade analysmaterialet visade inte pÄ andra slutsatser Àn de som dragits tidigare, att fÀrg och/eller betningsmedel har en sÄ pass stor betydelse för nedbrytningen att det Àr omöjligt att avgöra pÄverkan av andra faktorer, sÄsom bevarandemiljö eller tidigare ammoniak-behandlingar. DÀremot ledde arbetet till utökad kunskap om fÀrgÀmnen och betningsmedel i sydamerikanska arkeologiska textilier, vilket redovisats i en vetenskaplig publikation och Àven presenterats pÄ tvÄ konferenser. FÀrgÀmnesanalys inom projektet utfördes av University of Pisa
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