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 13,555 other followers

Categories

Follow @britishmuseum on Twitter

British Museum on Instagram

Happy birthday to Bob Dylan! Here’s a portrait of the legendary musician by David Oxtoby.
#music #portrait #art It’s #WorldTurtleDay! This early Greek coin with a sea-turtle was part of an important trading currency.
#coin #turtle #history Born #onthisday in 1859: Sir Arthur Conan Doyle. Here’s his application to study at the Reading Room.
All prospective users of The British Museum Library had to apply in writing, stating their reasons for study there. At the time he applied for a reader's ticket, Arthur Conan Doyle was already well-known as the creator of the great detective Sherlock Holmes, but he had not yet given up his work as a doctor, and in this letter of application he gives his occupation as 'physician'.
As well as his detective stories, Conan Doyle wrote many historical novels. At the time he wrote this letter he was probably carrying out research for his novel The White Company, which is set at the time of the Thirty Years' War (1618-48) in Europe.
#author #library #museum #BritishMuseum #history Mary Anning was born #onthisday in 1799, one of the most famous fossil finders of her day. This large skull and lower jaw of an ichthyosaur was found by her at Lyme Regis in Dorset in 1821. You can see it on display in the Enlightenment Gallery (Room 1), on loan from the @natural_history_museum.
© 2003 The Natural History Museum.
#history #fossil #dinosaur Albrecht Dürer was born  #onthisday in 1471. Here’s his wonderful drawing of a woman from 1520.
This study is drawn with a brush in black and greybodycolour. The light is strongly shown by white heightening when it falls onto the woman's face and hair. The light falls down the exact centre of her face. On the left, only the protruding eyelid and cheek bone catch the light. Her eyes are closed and her head centred, its outline strongly marked by black line and silhouette.
By 1520, the date of this drawing, Dürer was deeply interested in the ideal, human form. He had made numerous life studies, both male and female. He had also travelled to Italy and studied classical sculptures and their proportions. For Dürer, the chief purpose of these theoretical studies was to discover the mathematical proportions of the ideal human body. These he would then use in his paintings (portraits, altarpieces and images of saints) and prints. 
#Dürer #art #drawing #history The Enlightenment Gallery in the Museum (Room 1) shows how people saw the world in the 18th century.
The #Enlightenment was an age of reason and learning that flourished across Europe and America from about 1680 to 1820. This rich and diverse permanent exhibition uses thousands of objects to demonstrate how people in Britain understood their world during this period. It is housed in the King’s Library, the former home of the library of King George III.
Objects on display reveal the way in which collectors, antiquaries and travellers during this great age of discovery viewed and classified objects from the world around them.
#BritishMuseum #history #art #museum #gallery
Follow

Get every new post delivered to your Inbox.

Join 13,555 other followers

%d bloggers like this: