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 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.
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.
Stay tuned for a further blog on the conservation of some of a large collection of intaglio printing plates obtained along with this press.
Teaching inflation during the COVID-19 pandemic
COVID-19 has had an unprecedented effect on the economy: closing businesses, driving down demand and interrupting supplies. With news stories and popular culture addressing inflation and supply chain issues, now is the perfect time to explain this key economic concept to your high school students.
Queen of the bank notes
Few of us have ever met her, and it’s likely none of us are even remotely related to her. Yet, Canadians have carried her picture in their wallets for generations now. She’s Queen Elizabeth II and has been our monarch for over 70 years.
New acquisitions–2021 edition
The Bank of Canada Museum is responsible for the National Currency Collection, and part of its mandate is to foster and develop that collection. Despite the challenges of collecting during a pandemic, curators at the Bank of Canada Museum have acquired some unique artifacts—including some that document the pandemic itself.
The true value of money
What is money—when you really stop to think about it? To understand how money works, and what it ultimately represents, we need to strip it down to its very basic function.
The 1911 silver dollar
The 1911 silver dollar has a history to match its prestige, and it now has a permanent home in the National Currency Collection of the Bank of Canada Museum.
The $20 bill of 1969 was the prototype of the Scenes of Canada note series. Yet, as more notes were designed, the theme—and the $20 note itself—would change.