flax processing in the neolithic and bronze age pile-dwelling settlements of eastern switzerland
TRANSCRIPT
ORIGINAL ARTICLE
Flax processing in the Neolithic and Bronze Age pile-dwellingsettlements of eastern Switzerland
Urs Leuzinger • Antoinette Rast-Eicher
Received: 27 May 2010 / Accepted: 25 February 2011
� Springer-Verlag 2011
Abstract Numerous artefacts from the area of textile
production as well as finished products, fabrics and netting,
dating from the period between 3900 and 800 B.C. have
survived in the archaeological layers of late Neolithic and
Bronze Age wetland settlements in eastern Switzerland.
Archaeological investigations, experiments in textile tech-
nology and comparisons with Egyptian wall paintings, as
well as analyses under the scanning electron microscope,
allow us to almost completely reconstruct Neolithic textile
production in prehistoric pile dwellings.
Keywords Neolithic � Pile dwellings � Textiles � Flax �Scanning electron microscope � Switzerland
Introduction
This article discusses the processes involved in Neolithic
flax production, with respect both to cultivation and fibre
processing, from the region of what is today eastern
Switzerland between Bodensee (Lake Constance) and
Zurichsee—with a particular emphasis on the Cantons of
Thurgau and Zurich.
Pile dwellings from the Neolithic period and the Bronze
Age are found throughout the circum-Alpine area on lake-
shores and in bogs. More than 450 sites dating from the
period between 4300 and 800 B.C. have been discovered in
Switzerland alone (Suter and Schlichtherle 2009). The
prehistoric wetland settlements in eastern Switzerland—
among them well-known sites such as Arbon-Bleiche
3, Feldmeilen-Vorderfeld, Gachnang/Niederwil-Egelsee,
Greifensee-Boschen, Horgen-Dampfschiffsteg, Maur-Schiff-
lande, Meilen-Roorenhab, Pfyn-Breitenloo, Steckborn-
Turgi, Urschhausen-Horn, Wetzikon-Robenhausen and
Zurich-Alpenquai (Fig. 1)—are particularly worth men-
tioning due to the excellent preservation conditions for
organic materials (Natter and Schlichtherle 2009). The
remains of timber-built houses, countless seeds and fruits,
wooden implements and rare fragments of weaves and
fabrics made of Linum usitatissimum L. (linen) and tree bast
have been excellently preserved for millennia in the
waterlogged archaeological layers (Rast-Eicher 1997).
Moreover, thanks to dendrochronology, construction tim-
bers such as posts, poles and boards from the Neolithic and
Bronze Age houses can often be precisely dated, which
means that the chronological position of the individual
archaeological finds can be firmly established.
A significant amount of textiles has been, and continues
to be, found in almost every lakeside dwelling thanks to the
excellent preservation conditions (Bazzanelle et al. 2003;
Rast-Eicher 1997; Rast-Eicher and Dietrich forthcoming).
These textiles give exceptional insight into early textile
production. The quality of the fabrics was very good, flax
fibre processing having been based on thousands of years
of experience of using tree bast fibres. The new samples—
after a first example from Risch (Canton of Zug)—have
been chosen from sites with exceptional preservation of
fine threads: Zurich-Breitingerstrasse, Zurich-Mythenschloss
and Greifensee-Boschen. Further Bronze Age comparison
material was provided from the salt-mines of Hallstatt,
Austria.
Communicated by S. Karg.
U. Leuzinger (&)
Amt fur Archaologie Thurgau, Schlossmuhlestrasse 15a,
8510 Frauenfeld, Switzerland
e-mail: [email protected]
A. Rast-Eicher
Buro fur archaologische Textilien, 8755 Ennenda, Switzerland
123
Veget Hist Archaeobot
DOI 10.1007/s00334-011-0286-2
Fibre analysis by means of scanning electron micro-
scopy (SEM) has made it possible to analyse carbonized
material, which is almost impossible with light micro-
scopy. The SEM images give a three-dimensional view of
the fibres and, besides aiding identification, also allow us to
take a closer look at fibre processing and thread production.
Only unconserved material can be used for this kind of
analysis, as materials used in conservation very often cover
the surfaces.
Materials and methods
Flax processing illustrated by selected archaeological
finds
In order to gather as much information as possible on Neo-
lithic textile production, archaeologists work in close
cooperation with palynologists, botanists, conservationists
and textile specialists. This interdisciplinary research allows
us to answer numerous questions with regard to early textile
crafts. Experimental archaeology offers other significant
insights into the processing of plant fibres at the time. During
the excavation, tools such as spindle whorls, seeds and bones
give a first insight into the techniques and materials present
in the layer. Dating and spatial distribution and the amount
within the settlement show when and how important these
tools have been, and where they were used—for example in
specific houses only. Textile production needs a long series
of processes, from the production of the fibres in this area—
such as flax or sheep wool—which require knowledge of
agriculture and organization of the area, to the processing of
fibres, involving specialised knowledge of fibre properties
and textile production. The pile-dwelling settlements with
often well preserved organic materials are an ideal context to
study the whole process from the plant to the woven textile.
Arbon-Bleiche 3 and Pfyn-Breitenloo in Canton Thurgau
are two pile-dwelling settlements, where the individual steps
in Neolithic textile processing can be almost completely
reconstructed. From 1993 to 1995 an area of more than
1,100 m2 was excavated at the site of Arbon-Bleiche 3
(Leuzinger 2000; De Capitani et al. 2002; Jacomet et al.
2004; Jacomet 2009). A single-phase archaeological layer of
5–40 cm in thickness was discovered beneath a 2–3 m thick
sterile layer of sand. This cultural layer consisted of organic
bands, charcoal concentrations and distinct patches of clay.
More than 1,450 posts from houses made of Abies (silver fir),
Fraxinus (ash), Populus (poplar), Alnus (alder) and Quercus
(oak) were found. The analysis of the wood species and tree
rings made it possible to pinpoint the ground plans of the
houses exactly. There were at least four rows of houses, the
roof ridges of which were set parallel to the lanes between
them, which in turn ran at right angles to the lakeshore. The
oldest house in the settlement was built in 3384 B.C. After
only 15 years, in 3370 B.C., the village burnt down and was
never rebuilt. The site of Arbon-Bleiche 3, therefore, dates
exactly from the transition period between the Pfyn and
Horgen cultures.
The single-phase village of Pfyn-Breitenloo was con-
structed between two badly silted-up lakes in a small
shallow side valley off the main valley, the Thurtal
(Leuzinger 2007). The settlement originally consisted of
approximately 30 timber-built houses, which were occu-
pied from 3708 to 3704 B.C. In the autumn of 1944,
interned Polish soldiers under the direction of the archaeo-
logist Karl Keller-Tarnuzzer excavated approximately
Fig. 1 Map of Swiss sites mentioned in the article. 1 Arbon-Bleiche
3, 2 Gachnang/Niederwil-Egelsee, 3 Feldmeilen-Vorderfeld, 4 Grei-
fensee-Boschen, 5 Horgen-Dampfschiffsteg, 6 Maur-Schifflande, 7
Meilen-Roorenhab, 8 Pfyn-Breitenloo, 9 Steckborn-Turgi, 10 Ursch-
hausen-Horn, 11 Wetzikon-Robenhausen, 12 Zurich-Alpenquai, 13Risch, 14 Zurich-Breitingerstrasse, 15 Zurich-Mythenquai
Veget Hist Archaeobot
123
1,000 m2 of the late Neolithic settlement; further excava-
tions were done between 2002 and 2004. The characteristic
assemblage of vessels from Pfyn-Breitenloo later gave the
so-called Pfyn Culture (3900–3500 B.C.) its name.
The production of linen thread
The second step consists of the analysis of tools and threads.
It is clear that flax fibres were spun into fine thread, but how?
And how were the fibres processed prior to spinning?
Numerous spindle whorls have been found in the settle-
ments, but the exact processing from the raw flax stem to
fibre and then to a thread have not really been explained.
The question of fibre processing has already been raised
concerning Neolithic material from lake-dwellings (Rast-
Eicher and Thijsse 2001), and especially with regard to
Egyptian material and ultra-fine yarns from the Old
Kingdom, with up to 60 threads per centimetre (Cooke
et al. 1991; Vogelsang-Eastwood 1992; Kemp and Vogel-
sang-Eastwood 2001; Medard 2005). Egyptian linen
threads were spliced using fine strips (the term ‘‘splicing’’
is used here to describe the addition of fibre bundles to
produce a continuous thread, and cannot be translated by
the German spleissen which is a specific term in rope-
making), a technique of fibre processing seen on archaeo-
logical material, but also depicted in Egyptian wall
paintings. Cooke et al. discussed the possibility of green,
unripe, flax having been used (1991). The comparison with
Egyptian fibre processing will be taken up below. It con-
firms the stages of production as observed for our Neolithic
threads.
A first glimpse of fibre processing in Swiss material was
provided by a find from a site in Risch (Canton Zug) dated
to 3700 B.C. (Pfyn Culture) during the winter of 1996/1997
(Hochuli et al. 1998, Fig. 11; Rast-Eicher 2005). This find,
a fine linen thread, included strips of linen fibres which
were still stuck together with parallel nodes. This means
that the fibres had not been completely separated during
processing. In 1996, this question could not be pursued, but
was taken up again in 2006 when a project launched by the
Archaeological Department of Zurich (Kantonsarchaologie
Zurich) provided an opportunity and untreated material to
take a closer look at Neolithic linen threads by analysing
several samples and comparing the results with products
from experimental archaeology (Rast-Eicher and Dietrich
forthcoming).
Two examples may serve to illustrate the similarities and
differences between flax and tree bast: a textile from Zurich-
Mythenschloss (no/FK 1375), Schnurkeramik Culture was
made of Tilia (lime) bast (thread S-plied, diam. 0.7 mm; a
plied yarn is made of two single yarns; S is the twist
direction), while a thread from Zurich-Breitingerstrasse
(no/AF 17) Schnurkeramik or Horgen Culture was made of
flax (thread S-plied, diam. 0.3 mm) (Fig. 2a, b). Both
fragments were made of fibre strips, but the rays were still
visible in the lime bast thread from Zurich-Mythenschloss.
In this case fibre processing did not include complete retting
(partial decay on the ground or in water) and separation of
the fibres. In other cases, tree bast is difficult to distinguish
from flax (Korber-Grohne and Feldtkeller 1998). The indi-
vidual polygonal fibres of the linen thread from Zurich-
Breitingerstrasse were visible but stuck together, and the
nodes were clearly visible (Fig. 3f). The first question was
how much fibre processing was required to produce such a
thread.
In the summer of 2009 an experiment was carried out
which aimed to produce linen thread that resembled Neo-
lithic examples. The first thread was made using fibre strips
from green flax. The result did not correspond in any way
to Neolithic thread, as the fibres were covered by epider-
mis. The rectangular cells from the inside of the epidermis
were also visible. As a next step, field retting was intro-
duced to the process. The flax was spread out on a patch of
grass for a period of 10 days to 3 weeks. The stems that
had been exposed for 3 weeks were over-retted and the
fibres broke during further processing.
The fibres from the stems retted for a shorter period
10–12 days were easily stripped from the wet flax stems
and divided into finer strips (Fig. 2c). The stems were
deliberately broken several times—without damaging the
fibres—so that the hard inner parts fell away. Dried flax
had to be soaked in water for half an hour before further
processing could take place.
The wet strips were joined together by rolling the fibre
ends between the thumb and index finger (Fig. 2d). The
spliced yarn was then wound around a bottle cork and left
to dry. Two such ‘spools’ with spliced yarn were used to
spin a plied yarn using a drop spindle (Fig. 2e). The spliced
yarn had to be dry—moist or wet yarn broke.
Spinning and weaving
Since the early Horgen Culture (34th century B.C.) spinning
was carried out in what is today eastern Switzerland by
means of a spindle and a ceramic whorl. A total of 409
ceramic spindle whorls (Fig. 3a) as well as several frag-
ments of spindles made of Corylus avellana (hazel), Cor-
nus sp. (dogwood), Frangula alnus (alder buckthorn) and
Lonicera sp. (honeysuckle) were recovered from the lake-
side settlement of Arbon-Bleiche 3 (De Capitani et al.
2002). The distribution of the ceramic spindle whorls
throughout the settlement area clearly shows that thread
was originally spun in all the houses in Arbon-Bleiche 3.
The weights of the intact spindle whorls vary between 7
and 119 g; the majority, however, weigh between 16 and
35 g. It is worth noting that both the particularly heavy and
Veget Hist Archaeobot
123
Fig. 2 a Zurich-Mythenschloss, FK 1375, 2680 B.C., textile with
knotted pile; b Zurich-Breitingerstrasse, FK 17, c. 2700/2600 B.C.,
linen thread; c Experiment 2009, fibre strips being separated;
d Experiment 2009, two fine fibre strips being spliced together;
e Experiment 2009, two spliced yarns being plied. f Linen tabby
weave with starting border and selvedge from Gachnang/Niederwil-
Egelsee. Photographs: a–e A. Rast-Eicher; f AATG, D. Steiner
Veget Hist Archaeobot
123
Fig. 3 a Assemblage of spindle whorls from Arbon-Bleiche 3.
Diameter of the largest whorl: 8.6 cm; b Charred ball of S-plied linen
thread with a thickness of 0.5 mm from Pfyn-Breitenloo; c Charred
flax shives (straw fragments) from Pfyn-Breitenloo (3708–3703 ± 1
B.C.); d Experiment 2009, Spliced yarn, SEM photograph; e Zurich-
Breitingerstrasse, spliced yarn made of fine fibre strips, SEM
photograph; f Zurich-Breitingerstasse, S-plied linen thread, SEM
photograph; g Greifensee-Boschen, FK 2105, separated fibres, SEM
photograph; h Hallstatt (A), salt mine ‘‘Grunerwerk’’, middle Bronze
Age (1500–1200 B.C.), linen thread fibres, SEM photograph. Photo-
graphs: a–c AATG, D. Steiner; d–h A. Rast-Eicher
Veget Hist Archaeobot
123
the particularly lightweight specimens were concentrated
in certain buildings.
The finished product from this time-consuming process
can be inspected in the form of balls of thread (Fig. 3b).
Some of the charred flax thread was only 0.5 mm thick!
This thread was probably woven into regular narrow panels
of cloth using vertical warp-weighted looms. The use of
these looms is indicated by finds of round and conical loom
weights made of lightly burnt clay. These stretched the
warp threads on the frame of the loom. Concentrations of
loom weights were often found within the ground plans of
individual houses. This has enabled us to indirectly pin-
point the locations of the looms inside the buildings. In the
pile-dwelling settlements, flax was mainly used to make
tabby weaves, the easiest weaving pattern, weft over/under
one warp thread, or as weft in twining techniques (Fig. 2f).
Results
Step by step, from the field to the spun thread, the pro-
duction of linen textiles can be reconstructed by very close
analyses during excavation, and by further experiments to
explain fibre processing stages.
Archaeobotanical analyses carried out by researchers
from the Universities of Basel and Innsbruck revealed
numerous pollen and spores from a variety of plants
including pine, hazel, alder, beech, ivy, ferns, cereals and
flax from Arbon-Bleiche 3 and Pfyn-Breitenloo (Jacomet
et al. 2004; Haas et al. 2007). The relatively high propor-
tion of flax pollen in deposits at Pfyn-Breitenloo suggests
that the fields were located close to the settlement, since
flax pollen is dispersed by insects and not the wind. The
ripe flax was subsequently harvested and brought into the
village. Countless flax seeds were deposited in the cultural
layers after the harvest, and also seeds of Silene cretica
(Cretan catchfly), a characteristic flax weed. In the settle-
ment, the flax stems were broken and the fibres separated
from the woody components. This step in the process was
represented by countless remnants of stem deposited in
front of the houses (Fig. 3c). We can assume that further
fibre processing was done within the settlement as the
seeds found there are remains from rippling, the process
which removes the seed heads.
Viewed under the SEM, the result of the experimental
thread production was convincing: the spliced thread
looked very much like Neolithic thread, except for the spin
direction, which suggests that it was produced in a similar
manner (Fig. 3d, e). The difference in spin direction was
the result of holding the spindle differently. Woven textiles
found at Neolithic sites usually consist of S-plied thread, a
direction which does not normally occur when using a drop
spindle. The easiest way of working such a spindle is to
turn it clockwise while holding it in one’s right hand.
Therefore, we must assume that a different spinning tech-
nique was used to produce such thread. Attempts at pro-
ducing thread without a spindle have been made, but the
process appeared to be rather difficult without the rotation
of a spindle, as the spliced flax thread required quite a lot of
spin. The use of this technique has been suggested for the
production of tree bast thread, and this was in fact the case
in other cultures such as North American Indians or in
ancient Japan (Dusenbury 1985; Medard 2006). However,
a spindle with a lime bast thread was actually found in
Arbon-Bleiche 3 in Canton Thurgau (De Capitani et al.
2002), which shows that in our lake-dwellings tree bast
may also have been spun using a spindle.
The next question was how Bronze Age thread was made.
Bronze Age layers are not usually found in Swiss lakeside
settlements and therefore organic remains from that period
are rare. A small number of examples have been found in the
late Bronze Age site of Greifensee-Boschen dating from
around 850 B.C. (Canton Zurich; Eberschweiler et al. 2007;
Rast-Eicher and Dietrich forthcoming). The thread was still
plied, but looked much softer than that from the Neolithic
period. SEM analyses showed that the fibres were much
looser than those of Neolithic thread, accounting for the
softer appearance (Fig. 3g). Processing of the fibres was
visibly different and we may assume that, besides retting
(the process of rotting away the inner stalks of the flax to free
the fibres), combing also took place. Going back in time in
an attempt to find the moment at which techniques changed,
middle Bronze Age flax thread from the Hallstatt salt mine
‘‘Grunerwerk’’ was analysed. The SEM images showed
single fibres but the nodes were still parallel (Fig. 3h). This
was probably due to additional slow retting of the thread in
the salt mines, detaching all the fibres which were still stuck
together. There were only two Bronze Age samples, but the
results suggested that flax processing was different in the
late Bronze Age, when combing was introduced as a further
processing stage to produce fine separated fibres. This type
of processing meant that a single yarn could be spun instead
of splicing it. The fibres were still quite short, unlike modern
flax, and had to be plied. U. Korber-Grohne suggested a fibre
length of 21–30 cm for prehistoric flax in comparison to
modern flax with fibre lengths of 60–90 cm (1994). This
appears to have changed during the late Bronze Age or early
Iron Age, so that Iron Age flax thread consisted of single
yarns and was only rarely plied (Rast-Eicher 2008).
Returning to Egyptian fibre processing mentioned at the
beginning, there are interesting similarities between ancient
Egyptian and Neolithic thread production. Egyptian wall
paintings show the same steps as were used in Neolithic flax
processing, harvesting flax, rippling to remove the seeds,
breaking the stems, splicing and spinning/plying (Vogel-
sang-Eastwood 1992; Kemp and Vogelsang-Eastwood
Veget Hist Archaeobot
123
2001). There is no depiction of hackling or combing which
was used to get the long fibres only, letting the short ones
drop out, as was also the case with Neolithic thread.
The last part of the experiment differed somewhat from
the Egyptian method, as according to the wall paintings
Egyptians used ‘spinning bowls’, ceramic bowls with
internal loops, through which the thread was passed while
spinning to moisten the flax and perhaps to add starch paste
made of flour and water to strengthen the yarn (Kemp and
Vogelsang-Eastwood 2001).
Of course, the next question is whether Egyptian fibre
processing changed from splicing to spinning at the same
time as the changes occurred in European fibre processing?
The middle Bronze Age thread from Hallstatt seems to
have been produced in the old way, whereas the late
Bronze Age fabrics were probably made of combed
fibres—so when did this new technique appear? The results
suggest that the change occurred around 1000 B.C., but
since there are not enough samples yet available we cannot
say with any degree of certainty.
The results from the analysis of linen thread from Swiss
lakeside dwellings are as follows:
• Neolithic thread was plied using two spliced yarns.
• Flax had to be retted, but was not combed.
• Neolithic thread production was very similar to that of
ancient Egypt.
Discussion
Numerous artefacts including spindle whorls, spindles,
loom weights and finished fragments of netting and fabric
allow us to reconstruct Neolithic and Bronze Age textile
making techniques in the pile-dwelling sites throughout
eastern Switzerland. We can assume the flax production
was local, since well preserved layers like those at Arbon-
Bleiche 3 and Pfyn-Breitenloo contain remains of flax
processing. But there are scholars who suggest that some
villages specialized in growing and processing flax
(Schlichtherle 2009). It has not yet been established beyond
doubt whether sheep’s wool was already used in the latter
stages of the late Neolithic, since animal fibres do not
survive in the alkaline soils of the circum-Alpine wetland
settlements. Evidence from the animal bones, for instance
the increased percentage of sheep bones found, would
suggest that this may have been the case from the time of
the Schnurkeramik (Corded Ware) Culture onwards.
Furthermore, the shape of spindle whorls changes gen-
erally during the late Neolithic, which could come from a
change in raw material. We know for sure that wool has
been used in this area since the Bronze Age.
Microscopic analyses have shown that the original tex-
tile finds did not correspond exactly to the thread and
fabrics made to date by experimental archaeologists. In
particular, this concerns the processing of flax fibres. The
assumption to date has been that, in the Neolithic period
and up to the 20th century, the flax stalks had been retted
and then hackled by being pulled through combs. For
reconstructions of this step in the process, archaeologists
have traditionally referred to so-called ripple combs, split
and tied together with string. However, SEM analyses have
clearly shown that Neolithic linen fibres were processed as
strands of fibres, so that they were not hackled. This type of
fibre processing is very old and documented not only in
Europe with tree bast but even in the pre-pottery Neolithic
of the Near East with the use of bast fibres including Linum
sp. (PPNB in Nahal Hemar, Israel; Schick 1988). The same
technique was applied to flax in the Neolithic, and then also
in Bronze Age Egypt.
There, the whole processing is even shown on wall
paintings. However, there were small differences between
European and Egyptian techniques: our Neolithic fibres
must have been retted; if not, epidermis cells would often
be visible. Moreover, neither the SEM images nor the
experiments indicate that sizing (using glue to strengthen
warp threads) had been applied—in Egypt this was prob-
ably done at least for ultra-fine yarns by passing the spliced
thread through the loops in the ‘spinning bowls’ (Kemp
and Vogelsang-Eastwood 2001). It was not until the late
Bronze Age that the linen thread was hackled and combed,
and thus completely separated from straw (shives). Iron
Age linen thread was not usually spliced and only rarely
plied.
Conclusions
Due to the excellent preservation conditions and the
numerous and well-dated fragments of tools, flax remains
and remnants of textiles found in the pile-dwelling sites in
eastern Switzerland, it has been possible to reconstruct
completely the processes of textile production. By
archaeological methods (excavation), botanical analyses,
archaeological experimentation and detailed analyses
under the scanning electron microscope it has been possi-
ble to shed full light on prehistoric linen thread production
between 3900 and 800 B.C. Basically, early flax processing
seems to follow the tradition of the early—probably at least
Mesolithic—techniques of fibre processing used first for
tree bast fibres very probably in a wide geographical area,
which involved splicing. The change from spliced to single
yarn must be linked to the length of the fibres, and so to a
development of the plant as well.
Veget Hist Archaeobot
123
Acknowledgments We would like to thank Karina Gromer, Na-
turhistorisches Museum Wien, for providing the sample. We would
also like to thank Sandy Hammerle for her translation of our text.
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