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.

If you would like to leave a comment click on the title

Filed under: Amara West, Archaeology, , , , ,

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 8,608 other followers

Follow @britishmuseum on Twitter

British Museum on Instagram

Just 2 days until #Ming50Years opens! Here's one of the beautiful highlight objects.

Gilded bronze figure of Śākyamuni, the historical Buddha. Nanjing, China, Ming dynasty, Yongle mark and period, 1403–1424. It’s only 3 days until #Ming50Years opens! Have you booked your tickets? The Museum’s #AfricanRockArt project has now added over 4,000 digital photographs of rock paintings and engravings from the Sahara to the Museum’s online database. You can explore more of these stunning images on the project’s new interactive website http://www.britishmuseum.org/africanrockart Born #onthisday in 1890: author Agatha Christie. The British Museum held an exhibition in 2001–2002 called ‘Agatha Christie and Archaeology: Mystery in Mesopotamia’. It presented a fascinating look at the secret life of one of the world's most popular writers. Christie originally became interested in archaeology on a visit to the site of Ur (in modern Iraq) in 1928. It was there where she met her future husband, the archaeologist Max Mallowan, and became involved in excavation of the sites in Iraq and Syria that were to make his name. Watch curator Irving Finkel's documentary on The Real Noah's Ark on Channel 4 tonight at 20.00! #history #cuneiform #bible #noah #ark #tv #channel4 Andrea Mantegna died #onthisday in 1506. This drawing is an allegory of vice and virtue #art #drawing #italian #renaissance
Follow

Get every new post delivered to your Inbox.

Join 8,608 other followers

%d bloggers like this: