Helen Pashgian is often credited with being one of the pioneers of the Light and Space movement. In the 1960s and 1970s she used cast polyester resin to create translucent sculptures, delicately colored and often intimate in scale, that play with light to conjure a myriad of shifting, transient effects. Worried about the toxicity of polyester resin, she eventually switched to cast epoxy resin and sheet acrylic.

The video includes footage of her re-creation of a large, translucent polyester disc (stolen from an exhibition in 1971) in her new medium, epoxy. Pashgian has been firm in her opinions of conservation, with a very low tolerance for any sign of damage, "If there is a scratch on the surface, that's all you see."

More on the Getty Conservation Institute's Art in L.A. project: http://bit.ly/1hTYVWj