Introduction: Plaster Casting - Multi Part Molds

By HAR.MS
About: I'm M@. If you know Prototype This, TechShop, The Best of Instructables, Show Me How, or AVPII: Requiem, you've seen some of my work and the cool stuff I've been involved in. I build and design and make and th…
This slide show is going to take you through the process of duplicating a sculpture using a multi part plaster mold. In this case, it was a clay cow getting duplicated in a soft foam urethane. The materials needed include:

  • Plaster
  • Plaster bandages, fiberglass, hemp, burlap, or horsehair
  • Disposable gloves
  • A mixing bucket
  • Trash bags to line the bucket for mixing up plaster
  • Aluminum cans
  • Scissors
  • Duct tape
  • A screwdriver
  • Shellac
  • Chip brushes
  • Pam, mold soap, mold release, floor polish wax, Murphy's oil soap, or liquid vaseline to use as a mold release

This sculpture was made by Liz, another RISD student. This project was made possible due to the herculean efforts of Edmund Earle (kind of), Damian VanCamp, Lauren Kaufmann, and the brave RISD janitorial staff.