Keeping our heads on straight: custom mount design for Oplontis garden sculpture

BY CAROLINE ROBERTS, Conservator, Kelsey Museum of Archaeology

Over two hundred artifacts and sculptures are traveling from Italy to Ann Arbor for the upcoming exhibition Leisure and Luxury in the Age of Nero, opening in February. Among them are three marble heads that once stood in the north garden of Villa A at Oplontis. The heads will be displayed in the Kelsey’s temporary exhibition space as they once were in the garden: atop tall, narrow plinths. Sculpture like this might normally be held in place with a metal pin inserted into a hole in the base of the neck. These heads, however, lack such an accommodation, which meant that exhibition coordinator Scott Meier and I needed to come up with another way to secure the heads to their exhibit mounts.

Scott’s idea is to create a two-part mount custom fit to each head’s neck base. The mount will essentially serve as a clamp, immobilizing the head and preventing it from tipping off the plinth if it is accidentally bumped. In order to create such a mount we needed a cast of each sculpture’s neck. Scott and I were able to do this in person in June 2015, when we traveled to Oplontis with curator Elaine Gazda. First, I covered the ancient marble surface with a temporary layer of Parafilm® M, a stretchable plastic film, in order to protect the stone from any staining that might be caused by the mold-taking material.

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Carrie applies protective Parafilm® M to the base of each neck

 

For the mold-taking material we used silicone rubber putty, which Scott applied in a thick layer to the surface.

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Scott creates a mold of the neck using silicone rubber

 

The putty cured overnight, leaving us with three hollow, rubber neck molds – which we dubbed the “blue brains” because, well… that’s what they look like.

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Carrie and Scott pour plaster of Paris into the molds

 

These “brains” eventually served as receptacles for plaster, which we used to create duplicates of the neck bases.

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Plaster duplicate of one of the three neck bases

 

The duplicates are being used to cast the two-part mounts in epoxy resin. Once it’s cured, the epoxy will fit perfectly around the bases of the necks and hold the heads in place with the help of metal brackets. You won’t be able to see the custom-fit mounts when the heads are on display, but you will be able to appreciate the many steps that took place in order to recreate the sculptures’ original plinth presentation. See the marble heads and more in Leisure and Luxury next month at the Kelsey!

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