Last week, dry ice cleaning was performed on the port gun carriage’s wrought iron frame. This is the second time that this object has been cleaned with this technique. The first time was last spring and the carriage has been under electrolytic reduction since April. Speaking of electrolytic reduction (AKA “ER”), we often mention it but rarely explain the method. This is a stabilization technique that is used every day in this lab (and broadly in the field of conservation) and we can forget that it is not a simple matter… Our website has a great animation to illustrate the process, check it out here!
Last Wednesday was quite an exciting day for the team as we had fellow East Coast archaeological conservators visiting for the entire day! Nichole Doub from the Maryland Archaeological Conservation Laboratory, Johanna Rivera from the Clemson University Restoration Institute (working on the H.L. Hunley in Charleston, SC) as well as Emily Williams from The Colonial Williamsburg Foundation were introduced to the joy that is dry ice blasting. Our project manager, Will, worked to establish the ideal parameters to clean wrought iron artifacts from the USS Monitor collection with dry ice over the last few years. During our colleagues’ visit, he shared the process that has been developed here and advised them on the procedure to follow, should they decide to invest in such a cleaning tool in the future. The day resulted in many nerdy conservation discussions regarding the original surface of artifacts, active corrosion processes and other pH related questions. Thrilling!!