How paper is restored in Japan today

Building design

Despite increasing digitalization, a world without paper is unimaginable. A large part of mankind’s cultural heritage would not have survived without paper. This is why the restoration of this fragile organic material is so important. In our March issue (RESTAURO 2/2019), we focus on this important topic – and present a new restoration method from Japan. Because there they use […]

Despite increasing digitalization, a world without paper is unimaginable. A large part of mankind’s cultural heritage would not have survived without paper. The restoration of this fragile organic material is therefore of great importance. In Japan, people no longer use modern filler paper, but instead analyze the original paper and produce it by hand based on the results. Masaki Utsunomiya, Ph.D., from the University of Nara researched the theory and practice of this technique in his dissertation: it is called sukibame and has been continuously developed since 1998

Chamfering is a mechanical process that allows the restoration of large quantities of paper in a short time. This technique was developed in Europe, where paper is traditionally made from fine-fiber cotton or short-fiber wood pulp. During paper restoration, imperfections are filled with a fiber suspension. This method has been used in Europe since the beginning of the 20th century. This technique was also used for many books in Japan, where, in addition to replacing missing pieces of paper after restoration, a backing paper was usually attached to the reverse side. Unlike in Europe, mulberry bast, whose fibers are long and thick, was used extensively for paper production in Japan. The scientific study of old paper documents has shown a rapid development since around the year 2000. At the same time, the view prevailed that one of the aims of paper restoration should be to preserve the texture typical of Japanese paper in addition to repairing defects. However, if a backing paper is used, this changes the entire texture of the document, for example by altering the hardness.

The European method, in which defects would be replaced by new mulberry fibers, does not show satisfactory results here. In order to achieve textural equality between old and new material, a technique is required in which as much of the fibers as possible can do without backing paper and new material is used exclusively to fill defects. Together with Akinori Ogawa (Kochi Prefectural Paper Factory, formerly Kochi Prefectural Industrial Paper Technique Center), Tokuichi Taguro (Shubi Co., Ltd.) developed a new form of sukibame technique. Her attention was focused on a Japanese papermaking technique called Nagashizuki, in which the fibers are loosened during washing. With this technique, it is possible to produce restoration paper from long fibers such as those of the mulberry tree and at the same time rinse away excess fibers from all undamaged areas. This method, which was developed independently in Japan, is known as nagashi suki sukibame. Today, the majority of historical paper documents are restored using nagashi suki sukibame, shortened here to sukibame. The sukibame technique is mainly used for large quantities of mulberry paper, and its greatest advantage is the short time required.

You can read how sukibame was used for the restoration of paper documents from the Ii clan in Hikone in RESTAURO issue 2/2019 . You can also read the full article digitally as an ePaper.

POTREBBE INTERESSARTI ANCHE

Stonehenge highway tunnel unlawful according to court

Building design
A freeway tunnel is to be built 200 meters next to the Stonehenge (Photo: Song Shin/Unsplash)

A freeway tunnel is to be built 200 meters next to the Stonehenge (Photo: Song Shin/Unsplash)

The Stonehenge Alliance took legal action against the Stonehenge highway tunnel planned by highways england – and won.

The British government has been campaigning for several years to tunnel under the Stonehenge Stone Age monument. It argues that there will be less noise, less congestion and a better quality of life for residents in the surrounding villages. However, the opponents of the mega project are not impressed by this. They formed the Stonehenge Alliance and took legal action against the construction project – and were proven right.

Many stories and myths surround the Neolithic monument Stonehenge, which attracts thousands of visitors every year. Many of them arrive via the A303 highway, which passes within sight and, above all, within earshot of the monument. There is no question of mystical, romantic seclusion there.

Highways England, the state-owned company that looks after England’s freeways, wanted to do something about this. Its aim is to improve the A303, which connects England’s southwest with the southeast. At Stonehenge, the single-lane section is to be widened to two lanes. But that’s not all: a tunnel is planned right next to the Neolithic monument, which would take traffic out of sight of the landmark.

However, the planned reconstruction is not just for cosmetic reasons. According to highways england, it currently takes an hour or more – depending on the time of day – to pass Stonehenge on the highway. The expansion aims to reduce this time to eight minutes.

Two tunnels more than three kilometers long – one for each direction of travel – will run 200 meters underground next to Stonehenge, reconnecting the landscape on the surface for visitors, horse riders, cyclists and, of course, flora and fauna. Several new junctions will also prevent drivers from clogging up the surrounding villages to avoid traffic jams. Highways England planned to start the first phase of the mega project in 2023.

However, this will not happen for the time being. This is because a group of NGOs and individuals have come together under the name The Stonehenge Alliance to protect the World Heritage Site. The Stonehenge Alliance was formed back in 2001 to prevent the expansion of the highway in the World Heritage Site. In the end, this was actually put on hold – whether this result can be attributed solely to the Alliance remains unclear.

Today, the Stonehenge Alliance is speaking out against highways england’s mega-project with its Save Stonehenge World Heritage Site campaign. Their argument: the expansion and conversion would severely damage the landscape, which is considered one of the most archaeologically significant land areas in Europe. Among other things, the campaign criticizes the fact that highways england has not considered any alternatives, that previously undiscovered archaeological finds could be damaged and that local animals would be permanently disturbed by the construction work. Furthermore, too few clarifications had been made regarding flood risk, groundwater protection, geology and land contamination, as the subsoil is a unique limestone rock whose reaction to the planned measures is not certain.

Stonehenge ruling as a wake-up call for the government

In addition, the planned construction work violates the UNESCO World Heritage Convention and ignores UNESCO’s recommendations on the plans. This could lead to Stonehenge ending up on the red list of World Heritage in Danger. According to UNESCO, inscription on the red list is linked to specific requirements for remedying or averting the threat, a program for remedial measures and increased monitoring through annual reports on the state of conservation.

The Stonehenge Alliance’s objections have borne fruit. At the end of July, the High Court ruled that the British Transport Minister had acted unlawfully. He had not considered less harmful alternatives. For these reasons, the judge overturned the consent order issued by the British Transport Minister. According to the British news site BBC, the project will now be put on hold until the government has decided on its next steps.

John Adams, head of the Stonehenge Alliance, expressed his delight at the ruling in a press release: “Now that we are facing a climate emergency, it is all the more important that this ruling is a wake-up call for the government. It should re-examine its roads program and take action to reduce road traffic and remove the need to build new and wider roads that threaten the environment as well as our cultural heritage.”

That Stonehenge forms a large part of the UK’s cultural heritage is clear. Not only is it one of Britain’s most famous landmarks, it is also a masterpiece of engineering. It is located in England, between Bournemouth and Bristol, and is part of the Stonehenge, Avebury and Associated Sites World Heritage Site. The structure was built over a period of several hundred years – even before the invention of the wheel or before people started working with metal. Construction began as early as 3,000 BC, with the first of several stages.

The first monument – the first stage – consisted mainly of earthworks and was used for cremation burials. It was not until around 2,500 to 2,000 BC that the typical stones were added in further stages. Stonehenge as we know it today was created from huge sarsen stones weighing several tons and smaller bluestones. However, this required enormous efforts – moving this mass (and without using wheels!) would have required the manpower of hundreds of workers at the time. Not to mention the planning and organization. In total, the construction of Stonehenge took over 1,000 years.

So what was the fun for? There are several theories and myths surrounding the Neolithic monument, but no one can say for sure what the exact purpose behind it was. This is despite the fact that researchers have been studying it for decades. But Stonehenge is so old that there is no longer any collective memory that can recall its original purpose. There are no exact records that have survived the last 4,500 years – although there are of course some theories. These include, for example, that Stonehenge was a place for ceremonies, a sacrificial site or an observatory. The latter refers to the alignment of the STEINs, which are arranged according to the solstice and equinox.

Also topical: Munich’s Olympic Park as a World Heritage Site? Read here why it has what it takes.

Ideal framework conditions

Building design
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For a long time, the area between Tel-Aviv-Straße, Perlengraben and Blaubach – an area in the middle of Cologne’s city center – was dominated by dreary functional buildings. The overall concept for the redesign by Cologne urban planner Boris Enning won over the jury of the architectural competition. The “55 Frames” project meets urban living requirements with different formats: from penthouses and individually designed apartments to townhouses and garden apartments on the first floor.

The eponymous frames, which protrude irregularly from the white outer façade like drawers being pulled out, structure the building and open up the living space to the outside, while offering the residents protection and security through the frames. Fastening the concrete frames in this project initially seemed difficult due to the high weight, but with the help of the “Isokorb type WXT” from Schöck, the required load-bearing capacity of the projecting wall panels and thus the “frames” was achieved without any problems: For this purpose, one wall panel was each connected to an Isokorb type WXT and the internal wall, the other wall panel is anchored in the external wall with a type WXT bent into the support, as there was no internal wall here for the back anchorage. The upper and lower ceiling panels are only fixed with the Isokorb supplementary type HP-XT and rest on or hang from the wall panels. The Isokorb type WXT is a load-bearing thermal insulation element with 120 mm insulation thickness for cantilevered wall panels.

Schöck Bauteile GmbH
Vimbucher Street 2
76534 Baden-Baden, Germany
www.schoeck.de