To create the hundreds of plaster casts for The Great Wall of Vagina, Jamie developed his own process that could be adapted to suit all the different models. There would be different labia sizes to consider, pubic hair, piercings and other differences that would require a variety of approaches. He researched the best skin-safe, medical grade materials.
The surface is detail is captured in a layer of alginate – similar to the material used by dentists to mould inside the mouth. This layer, once it has set into a flexible rubber, is then backed up by a layer of plaster bandage, like doctors used to set broken bones with. That two-part mould is then used as a template to make the plaster.