Tender loving care for a significant artifact
It’s not all currency. The Museum holds 1000’s of items related to the business of making money—literally. The addition of a 19th-century printing press to the vaults presented some unusual challenges to the collections team.
A venerable printing firm donates its history
In 2012, the Ottawa-based security printing firm BA International closed. Formerly the British American Bank Note Company, BA had been printing bank notes, passports, bonds and other secure documents since before Confederation. With this closure came an opportunity for the Museum’s National Currency Collection (NCC) to acquire objects that showcase the production processes used by BA and other security printers. Luckily, one of the pieces offered to us was a large production tool known as a spider press.
A 500-year-old tradition
Used extensively in the 19th century, this type of hand-operated press printed secure financial documents using the intaglio method. Intaglio literally means carving, and initially, an image would indeed be carved (engraved) into a soft steel plate. This plate would be coated in ink and wiped with a cloth to remove the ink from the non-engraved surfaces. It was then placed on the press underneath a clean sheet of paper. The press operator would turn the machine’s hand wheel, rolling the plate-and-paper combo between two large, heavy cylinders. The pressure of the cylinders would push the paper into the ink-filled areas, leaving a raised print on the paper. The multiple spokes of the hand wheel, reminiscent of the legs of a spider, gave rise to the name “spider press.”
The press is stored on a pallet and moved with a hydraulic jack. It takes four strong people to shift it even a few centimetres.
The Devil is in the humidity
When our BA spider press arrived in 2013, we discovered it had been exposed to a greater amount of moisture than expected. The result? A coating of bright orange corrosion had blossomed over all the exposed steel surfaces. As well, years of use had left crusts of dust, dirt and grime embedded in the crevices of the machinery.
As it was not intended to go on display immediately, we decided to treat the spider press before it went into storage at the Museum. The goal was to reverse as much of the damage as possible and hopefully prevent further active corrosion from appearing.
Gentle treatment for a heavy machine
After several spot tests, we decided that the corrosion should be removed with extra fine steel wool followed by gently wiping the surface with soft cloths and alcohol. The embedded dirt and grime was then removed with cotton swabs lightly dampened with mineral spirits. Finally, a thin layer of machine oil was applied to all the metal surfaces to act as a protective coating.
The original surface can be seen in the upper cylinder while the corrosion is being removed during treatment.
A fresh coating of machine oil was applied to protect the surface. This also has the added benefit of allowing the machine to function smoothly.
Putting the spider press to bed
Once the press was moved back into storage, it was sealed in a tent of polyethylene sheeting along with packs of moisture-absorbing silica gel. This created a drier micro-climate around the press. The condition of the spider press will be monitored as it remains in storage, making sure this valuable artifact will be around for generations more.
With the treatment fully complete, the rolling bed was re-installed between the upper and lower cylinders and the press photographed for the database.
Stay tuned for a further blog on the conservation of some of a large collection of intaglio printing plates obtained along with this press.
We want to hear from you! Do you have an idea for a blog post you’d like to see?
Content type(s):
Blog posts
August 6, 2024
The Bank of Canada Museum’s collection has a new addition: an artwork called Free Ride by Frank Shebageget. But why would a museum about the economy buy art?
Treaties, money and art
Content type(s):
Blog posts
Subject(s):
Arts,
History
July 16, 2024
An item is said to have cultural value when it can be directly associated with the history, people, beliefs or rituals important to a society. It’s the same with a rai—its value can be greater depending upon who authorized it, who carved it and who subsequently owned it.
Rai: big money
By: Graham Iddon
Content type(s):
Blog posts
Subject(s):
Economy,
Geography,
History
Grade level(s):
Grades 11 and 12 / Secondary 5 and CEGEP
April 18, 2024
What the stock market crash of 1929 did was starkly reveal the weaknesses of economic systems that had evolved from the unregulated capitalism of the late 19th century.
Lessons from the Great Depression
By: Graham Iddon
Content type(s):
Blog posts
Subject(s):
Financial literacy,
History
Grade level(s):
Grade 09 / Secondary 3,
Grade 10 / Secondary 4,
Grades 11 and 12 / Secondary 5 and CEGEP
March 25, 2024
Newfoundland’s entry into Confederation marked the end of an era when Canadian provinces issued their own coins and paper money.
Welcoming Newfoundland to Canada
By: David Bergeron
Content type(s):
Blog posts
December 19, 2023
It’s that time of the year again—the wrap-up of the Bank of Canada Museum’s annual acquisition program. Here are a few highlights of the latest additions to the National Currency Collection.
New Acquisitions—2023 Edition
Content type(s):
Blog posts
November 27, 2023
But what do you do with money once you have it? That’s for you to decide. A budget can really help. It will allow you to keep track of what you earn (income) and what you spend (expenses).
Mo’ money, mo’ questions
Content type(s):
Blog posts
Subject(s):
Financial literacy
Grade level(s):
Grade 04,
Grade 05,
Grade 06,
Grade 07 / Secondary 1,
Grade 08 / Secondary 2,
Grade 09 / Secondary 3,
Grade 10 / Secondary 4,
Grades 11 and 12 / Secondary 5 and CEGEP
