British Museum blog

After-excavation care at Amara West

Elisabeth Pamberg, archaeological illustrator/conservator

Salt crystals on the rim of beer jar C8008

I visited the stores where we keep the objects excavated from the site, to check they were in good condition. Objects from a site like this one often contain salts that could damage them, so I wasn’t surprised to observe that several objects had salt crystals on them, particularly the pottery and some stone sculpture.

The artefacts retrieved at Amara West are subject to environmental conditions which include high humidity and salinity, the result of the site’s proximity to the Nile. Ceramic and stone buried in soil absorb the salts present in the deposits.

Beer jar C8007 after desalination this week

Following my advice, and discussions with Marie Millet and Neal Spencer, two beer jars from grave 201 were chosen for treatment, as they were affected by salt, with a thick visible layer of white concretions.

The salts are harmful and are not only an aesthetic issue; they obscure the object’s surface and can lead to surface exfoliation – the surface lifting off. Eventually, the crystallisation of salts can lead to disintegration.

The most efficient way to extract salt consists of soaking the objects in water over a long period of time, though extra steps need to be taken with fragile objects, or those bearing paint.

The removal of soluble salts can be a very lengthy procedure. In this case, the jars were bathed repeatedly in plenty of warm water for a period of eight days with the water being changed every day.

Unfortunately, no distilled or deionised water and conductivity meter (to measure the decreasing level of salt) is available here. Nonetheless, soluble salts appear to have completely disappeared from the jars, ensuring their long-term preservation.

Looking to future seasons, we might consider testing salt levels in the local river water, which is used for washing all pottery prior to study, recording and storage.

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English sculptor Henry Moore was born #onthisday in 1898.
Drawing played a major role in Henry Moore's work throughout his career. He used it to generate and develop ideas for sculpture, and to create independent works in their own right.
During the 1930s the range and variety of his drawing expanded considerably, starting with the 'Transformation Drawings' in which he explored the metamorphosis of natural, organic shapes into human forms. At the end of the decade he began to focus on the relationship between internal and external forms, his first sculpture of this nature being 'Helmet' (Tate Collections) of 1939.
This drawing titled ‘Two Women: Drawing for sculpture combining wood and metal’ was based on a pencil study entitled ‘Ideas for Lead Sculpture’. It reflects his awareness of surrealism and psychoanalytical theory as well his abiding interest in ethnographic material and non-European sculpture; the particular reference in this context is to a malangan figure (malangan is a funeral ritual cycle) from New Ireland province in Papua New Guinea, which had attracted his interest in the British Museum. 
Henry Moore, Two Women: Drawing for sculpture combining wood and metal. England, 1939. Here's another fabulous view of the Great Court captured by @whatinasees at our instagramer event #regram #repost
Check out all of the photos at #emptyBM Vincent van Gogh died #onthisday in 1890. Here's a print of his only known etching. It depicts his doctor, Dr Paul Gachet, seated in the garden of his house.
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The Hunterston brooch will feature in our forthcoming #Celts exhibition, on loan from @nationalmuseumsscotland. Encounter an African contribution to the global carnival tradition through contemporary artist @zakove’s Moko Jumbie sculptures in the Great Court. These spectacular 7-metre-high male and female figures in striking black and gold costumes are inspired by aspects of African masquerade. #ZakOve
Find out more about our #Africa season this summer with events and displays at www.britishmuseum.org/whats_on/celebrating_africa.aspx
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