Spaceman Sighting?

Nah……That’s just conservator Cait Shaffer preparing to treat the cannon carriage part from Fort Jefferson – Dry Tortugas National Park in Florida that we first introduced to you back in February. Cait recently finished the desalination treatment of the cannon carriage and is preparing to air-abrade (some liken it to sand- blasting) the iron surface of the artifact, using walnut shell as the abrasive powder, in order to clean the surface of dirt and concretions as well as to remove any corrosion products. After this mechanical cleaning, the artifact will be treated with tannic acid in order to inhibit any further corrosion.

Wheeling the cannon carriage outside the lab and under a tent in preparation for air-abrading.

Protective gear on? Prepare to abrade!


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