Encyclopedia of Global Archaeology

2014 Edition
| Editors: Claire Smith

Textiles and Fabrics: Conservation and Preservation

Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-0465-2_488

Introduction

A textile is a binary system of fibers or other materials worked into threads. In essence a textile is formed by weaving, but the term can also be used more generically and thus covers flexible products made in other techniques, as, for instance, twining, needle binding, knotting, and knitting. Felting and basketry are also techniques related to textiles. Thus, textiles can be seen as one part of an overall cloth culture, which may include many different materials and techniques (Harris 2012).

Around the world and throughout time, humans have created textiles by exploiting different natural resources and inventing tools and methodologies to change these resources into a viable product. Some areas are rich in traditional textile resources, like materials for fibers, dyes, and tools, but also in less resource plentiful areas, humans have found solutions for fulfilling the demand for textiles.

Definition

Until very recent times, textiles were primarily made from natural fibers of either plant or animal origin. The most well-known plant fibers are flax, hemp, nettle, and cotton, while the most well-known animal fibers are sheep wool and silk. Like any perishable organic material, these fibers are subject to rapid decomposition in archaeological contexts, and their preservation requires special conditions to prohibit their destruction by microorganisms.

Key Issues/Current Debates/Future Directions/Examples

Contexts

Environmental conditions affect the survival of plant and animal fiber materials in various ways. In general, an acidic environment favors the preservation of proteinaceous fibers, while a alcaline environment does the same for fibers of vegetal origin. As most degradation requires the presence of air, many textiles have been found in contexts where anaerobic and/or waterlogged conditions occur. Other conditions like extreme dryness or permanent frost; the presence of salt; exposure to fire, which leads to the creation of carbonized samples; or through mineralization when coming into contact with metal salts have also preserved many textiles.

The find context influences the preservation of archaeological textiles. In Europe, most textile remains have been found in connection with burials, such as costumes, wrappings of human remains and/or grave goods, furnishing, and other utility textiles. In inhumation graves, the organic materials are often exposed to heavy and fast degradation, and, in most cases, it takes special conditions as, for instance, the presence of metal salts from copper or iron to prevent the degradation (e.g., Bender Jørgensen 1992; Rast-Eicher 2008; Gleba & Mannering 2012). Though these textiles are often very small and in a stage where further organic analyses are excluded, they still offer due to their number and firm structure an important source to European textile technology. In dry climates as in Egypt, many textiles have been preserved by desiccation and aided by the burial custom of embalming the dead. In a similar way, the special tradition of embalming and placing the dead in caves, which was performed in the pre-Columbian Inca kingdom, has preserved many colorful textiles made of cotton and wool in South America. Frozen environments like the Norse burials in Greenland have left fabrics almost unaltered, and in the recent years, the melting of glaciers in, for instance, Switzerland and Norway have also revealed well-preserved textile finds. In Denmark, the waterlogged, anaerobic, and acidic environment in burial mounds has favored the preservation of a large collection of complete Bronze Age textiles and costumes.

Other important contexts where textiles may occur are settlements, harbor areas, garbage dumps, and earth fillings. Many excavations in medieval towns around Europe have revealed new and important textile corpuses that supplement and challenge information based on written sources, and also textiles found in churches and relics provide important perspectives to our textile history. Especially in Northern Europe, many textiles have been found in connection with ritual offerings, as in weapons deposits, or together with mummified human remains. From these lake and bog contexts, many complete wool textiles and other objects made of skin and fur dated to the Iron Age have been preserved. Until recently, it was believed that this acidic environment in the North European high bogs only favored preservation of proteinaceous origin, while it was only larger objects of plant origin like cords and ropes made of tree bast, stems of flax, and wooden objects that could be preserved in bogs. Nevertheless, during the reexamination of the Huldremose Woman (Fig. 1), the last remains of a textile in plant fiber was discovered on her back, and threads from this weave could also be located in many folds in her skin (Frei et al. 2009). This is the first time that a plant fiber textile has been recorded from a bog context in Denmark. This example shows that although a specific context and environment in general favors a specific material, every archaeological find is in itself unique. When excavating new finds or researching already excavated finds, it is important to be open for all possibilities in order not to overlook important archaeological materials.
Textiles and Fabrics: Conservation and Preservation, Fig. 1

The Huldremose Woman’s costume consists of two skin capes, a woven skirt and a scarf in wool, and an undergarment in plant fiber. The woman and her fantastic well-preserved costume were found in a bog on Djursland in Denmark in 1879 and belong to the National Museum of Denmark. The find is 14C dated to 350–341 BCE

The scarcity and poor preservation of archaeological textiles are two factors usually cited for the absence of focus on textile studies. Although valid to a certain extent, such reasoning has obscured the fact that textiles are much more abundant in archaeological contexts than generally assumed and should, whenever present, be studied in the same way as any other archaeological finds.

Textile Research and Scientific Analyses

Textiles have an enormous potential in archaeological research, being able to tell about social, chronological, and cultural aspects of past societies, and at the same time providing us with a unique opportunity to come very close to the prehistoric or historic individual. Substantial information about past societies can be gained from the study of textiles, but this information depends on the analytical tools and methods used. A textile contains information about the process and the tools used in the various stage of its production. The decoding of a textile is imperative for the understanding of the many different processes involved in its production, and the methods may vary according to the state of preservation (Andersson Strand et al. 2010). For instance, the processing of a fiber material from the source to the final thread and the weaving and sewing will not only tell about breeding systems and the technological knowledge of that time but also indicate more subtle information about visual preferences and human desires.

Fiber identification is an important starting point in textile research as it indicates the properties of this material as well as the possible use. The identification of fibers is in most cases based on morphological characteristics performed by various types of microscopy. The optical microscopy is the most basic tool which together with scanning electron microscopy (SEM) enables precise photographing and measuring. In these cases sampling is necessary. Fiber identification can be difficult in cases of highly aged and deteriorated samples where fiber characteristics have been changed and/or where sampling is complicated by the fragility or the scarcity of the fibers. In such cases, scanning electron microscopy is especially useful and combined with energy dispersive X-ray spectroscopy (SEM/EDX) inorganic elements in the fibers such as pigments, mordants, and salts, and proteins in animal fibers can also be analyzed. Transmitted electron microscopy (TEM) can provide information on the internal fiber structure such as the pigmentation of wool fibers. Gas chromatography/mass spectrometry (GC/MS) and infrared microspectroscopy (FTIR) are useful analytical methods for the identification of resins, oils, and balsams that can have been applied to textiles. High-performance liquid chromatography (HPLC) is used to obtain information about dyes or dye components that are not visually detectable anymore. Especially, dye analysis provides important information to the archaeological interpretation that characterize visual preferences, technology, and exchange of know-how and goods (Vanden Berghe et al. 2009). Radiocarbon dating (14C) can be used for textiles from disturbed contexts or contexts where no other datable object exists (Mannering et al. 2010). Textile materials are, in general, well suited and reliable for 14C dating, although the presence of conservation substances should be evaluated before sampling. Stable isotopes can reveal facts about the nutrition (Wilson et al. 2001), while strontium isotopic analysis, which has now been adapted to fibrous material, can reveal whether the textiles are of local or nonlocal origin (Frei et al. 2008). DNA sequencing is useful for the identification of specific species, which are otherwise hard to identify, but the results highly depend on the preservation conditions (Ørsted Brandt et al. 2011). Detection of species of animal origin can also be done with mass spectrometry-based protein sequencing (MSPS) (Schmidt et al. 2011).

The constant improvement of scientific analytical methods and the development of new ones will often inspire further analyses. Yet, most analytical tools require sampling, and it is important to develop more nondestructive methods in order to secure our common world heritage, and to improve working conditions and the scientific outcome. The importance of taking samples should be evaluated prior to analysis, and sampling should preferably be done before any contamination has occurred. Accurate documentation, preferably by photographs, of where samples have been taken is imperative.

Preservation and Conservation

The aim of an active conservation treatment is to improve the condition of the textile by trying to eliminate some of the causes of deterioration, and the aim of preventive conservation is to slow down the rate of further degradation (Skals 1996). Textiles preserved in archaeological contexts are often weak and tend to be fragile and decompose easily when exposed to changes in the climatic conditions and to touching and handling. A general rule is that dry textiles should be kept dry, wet textiles kept wet, and textiles should be stored in a cool place until the conservation treatment can commence. Adding consolidants during retrieval or biocides to avoid bacterial or fungus growth should be avoided as future scientific analyses thereby will be complicated or prevented (Gillis & Nosch 2007).

The method of drying waterlogged archaeological textiles and the questions of pretreatment with lubricating additives such as polyethylene glycol (PEG) or glycerol are factors which has been the focus of much discussion and research. Freeze drying has been evaluated as the gentlest form of drying. It can be done under vacuum or at atmospheric pressure. The discussions regarding pretreatment are somewhat unresolved because the additives in theory are soluble and the treatment reversible. Nevertheless, it can be very difficult to completely remove additives from archaeological fibers. Lubricants are often added to waterlogged wood to replace the water that has filled the empty spaces in the cell structure. Adding lubricants to textile fibers with the aim of replacing the water in the fiber structure is a different matter. The molecular structure is different from wood, and the empty spaces inside fibers are very tiny. Furthermore, the yarn structure, consisting of many fine fibers twisted together, will cause the liquid additives to run into all the air spaces and coat the fibers. Completely removing them is impossible without much damaging manipulation of the textiles. Also future scientific analyses will be unreliable. Avoiding the use of lubricants is therefore recommended (Peacock 2005).

Cleaning of textiles is an irreversible process, and the effect of cleaning on the condition of the textile must be evaluated before a treatment is chosen. Thorough cleaning of wet archaeological textiles prior to drying should be avoided as should also wet cleaning of dry archaeological textiles. Dirt can be the cause of long-term degradation but also be part of the history of the object. Likewise, the cleaning process may remove less stable substances like dyes and paint which may not be visible to the naked eye, or pollen assemblages stored in the textile, which in turn contain information about human activities and the environment.

The long-term preservation of textiles will be enhanced by good, clean, and cool storage. Fragile textiles should be supported, and shelves and drawers should be well fixed to eliminate mechanical damage. The textiles should be protected from deteriorating effects of light, heat, and high humidity, and regular monitoring for insect infestation is recommended.

Due to the fragile nature of textiles, they will inevitably degrade. Careful handling and ideal storage are preventive methods that can slow down the degradation, but they can never prohibit or stop it. Therefore, it is of utmost importance that archaeological textiles are analyzed and studied when possible. In this work, a useful tool is high-resolution digital photography which provides accurate documentation of the object and its condition at a certain time. At the same time, this technique also opens for a wider scientific use and dissemination of these fragile objects, which reaches beyond their physical presence.

Conclusion

Textile research is a worldwide occupation which is performed within many different disciplines. This is also the case within archaeological textile research where the theoretical and methodological approach, to a large extent, depends on the research traditions in the different geographical and cultural historical areas. Research in archaeological textiles are performed by, among others, archaeologist, historians, art historians, textile designers, conservators, and crafts people, and each in their way, they are able to contribute with important aspects to the understanding of the production and use of textiles.

Textiles and fabrics are an important part of our common world heritage. Most cultures and peoples around the world use textiles for multiple purposes and the same are true for past societies. Common for this worldwide endeavor is first and foremost the wish to keep warm and comfortable, but textiles also have an important role in expressing who we are – our gender, age, family affiliation, status, occupation, religion, and ethnicity. Knowledge of textile history is hence a key to our understanding of a multitude of human issues.

Cross-References

References

  1. Andersson Strand, E., K.M. Frei, M. Gleba, U. Mannering, M.-L. Nosch & I. Skals. 2010. Old textiles - new possibilities. European Journal of Archaeology 13: 149-73.Google Scholar
  2. Bender Jørgensen, L. 1992. North European textiles until AD 1000. Aarhus: Aarhus University Press.Google Scholar
  3. Frei, K., R. Frei, U. Mannering, M. Gleba, M.-L. Nosch & H. Lyngstrøm. 2008. Provenance of ancient textiles - a pilot study evaluating the Sr isotope system in wool. Archaeometry 51: 252-76.Google Scholar
  4. - 2009. The Huldremose Iron Age textiles, Denmark: an attempt to define their provenance applying the strontium isotope system. Journal of Archaeological Science 2009: 1-7.Google Scholar
  5. Gillis, C. & M.-L. B. Nosch. (ed.) 2007. First aid for the excavation of archaeological textiles (Ancient Textiles series 2). Oxford: Oxbow Books.Google Scholar
  6. Gleba, M. & U. Mannering. 2012. Textiles and textile production in Europe from prehistory to AD 400 (Ancient Textiles series 11). Oxford: Oxbow Books.Google Scholar
  7. Harris, S. 2012, From the parochial to the universal: comparing cloth cultures in the Bronze Age. European Journal of Archaeology 15: 61-97.Google Scholar
  8. Mannering, U., G. Possnert, J. Heinemeier & M. Gleba. 2010. Dating Danish textiles and skins from bog finds by means of 14C AMS. Journal of Archaeological Science 37: 261-68.Google Scholar
  9. Ørsted Brandt, L., L.D. Tranekjer, U. Mannering, M. Ringgaard, K.M. Frei, E. Willerslev, M. Gleba, M.T.P Gilbert. 2011. Characterising the potential of sheep wool for ancient DNA analyses. Archaeological and Anthropological Sciences 3: 209-21.Google Scholar
  10. Rast-Eicher, A. 2008. Textilien, Wolle, Schafe der Eisenzeit in der Schweiz (Antiqua 44). Basel: Archäologie Schweiz.Google Scholar
  11. Schmidt, A.L., M.T.P. Gilbert, E. Cappellini & J.V. Olsen. 2011. Identification of animal species in skin clothing from museum collections. ICOM-CC 16 th Triennial Conference Lisbon, Portugal, September 19-23, 2011: 1-8.Google Scholar
  12. Skals, I. 1996. From grave to showcase: modern care for ancient textiles. Archaeological conservation and its consequences. IIC Preprints of the Contribution to the Copenhagen Congress.Google Scholar
  13. Peacock, E.E. 2005. Investigation of conservation methods for a textile recovered from the American Civil War submarine H.L.Hunley (1864), in P. Hoffmann, K. Strætkvern, J.A. Spriggs & D. Gregory (ed.) Proceedings of the 9 th ICOM Group on Wet Organic Archaeological Materials Conference: 497-512. Bremerhaven: WOAM.Google Scholar
  14. Vanden Berghe, I., M. Gleba & U. Mannering. 2009. Towards the identification of dyestuffs in early Iron Age Scandinavian peat bog textiles. Journal of Archaeological Science 36: 1910-21.Google Scholar
  15. Wilson, A.S., R.A. Dixon, H.I. Dodson, R.C. Janaway, A.M. Pollard, B. Stern & D.J. Tobin. 2001. Yesterday's hair - human hair in archaeology. Biologist 48: 213-7.Google Scholar

Further Reading

  1. Banck-Burgess, J. 1999. Hochdorf IV, die Textilfunde aus dem späthallstattischen Fürstengrab von Eberdingen-Hochdorf (Kreis Ludwigsburg) und weitere Grabtextilien aus Hallstatt- und Latenezeitlichen Kulturgruppen. Stuttgart.Google Scholar
  2. Barber, E.J.W. 1991. Prehistoric textiles. The development of cloth in the Neolithic and Bronze Ages. Princeton: Princeton University Press.Google Scholar
  3. Bender Jørgensen, L. 1986. Forhistoriske textiler i Skandinavien. Prehistoric Scandinavian textiles (Nordiske Fortidsminder ser. B 9). Copenhagen: Det Kgl. Nordiske Oldskriftselskab.Google Scholar
  4. Bjerregaard, L. (ed.) 2007. Chachapoya textiles. Copenhagen: Museum Tusculanum Press.Google Scholar
  5. Grömer, K. 2010. Prähistorische Textilkunst in Mitteleuropa. Geschichte des Handwerkes und der Kleidung vor den Römern. Wien: Naturhistorisches Museum Wien.Google Scholar
  6. Hald, M. 1980. Ancient Danish textiles from bogs and burials. Copenhagen: National Museum of Denmark.Google Scholar
  7. Möller-Wiering, S. 2011. War and worship. Textiles from 3rd to 4th-century AD weapon deposits in Denmark and northern Germany (Ancient Textiles series 9). Oxford: Oxbow Books.Google Scholar
  8. Østergård, E. 2004. Woven into the earth. Textiles from Norse Greenland. Aarhus Universitetsforlag.Google Scholar
  9. Schlabow, K. 1976. Textilfunde der Eisenzeit in Norddeutschland (Göttinger Schriften zur Vor- und Frühgeschichte 15). Neumünster: K. Wachholtz.Google Scholar
  10. Tímár-Balázsy, A. & D. Eastop. 1998. Chemical principles of textile conservation. Oxford: Butterworth Heinemann.Google Scholar
  11. Walton, P. & G. Eastwood. 1983. A brief guide to the cataloguing of archaeological textiles. London: Institute of Archaeology Publications.Google Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.The Danish National Research Foundation's Centre for Textile ResearchThe National Museum of DenmarkCopenhagenDenmark
  2. 2.Department of ConservationThe National Museum of DenmarkKgs. LyngbyDenmark