How to make a plaster casting picture frame

Updated November 21, 2016

A plaster-cast picture frame makes a special gift for someone you know, or you can make one and keep it for yourself to proudly display in your home. You could attach a mirror, painting, photograph or even a collage to the frame to make it truly unique. Be as creative as you wish by adding pressed flowers or other embellishments to further decorate your frame.

Brush vegetable oil on the inside of the frame mould; you only need to use a thin layer. If your plaster is not ready-made, follow the instructions on the bag to mix the plaster. Plaster of Paris can be bought at your local craft or hardware shop and is typically mixed with water.

Bend a piece of wire about 15 to 20 cm (6 to 8 inches) long upwards at a 90 degree angle to make a loop in the middle of the wire. This will enable you to hang your picture frame.

Pour enough plaster into the mould to cover the design surface. With the frame mould on a flat surface, gently tap the mould. This step is to dislodge any air bubbles that could be trapped in between the mould surface and the wet plaster of Paris. Most moulds are clear so you should be able to see if there are any air bubbles by tipping the frame mould without moving the plaster around much. Keep on tapping until you cannot see any air bubbles at all. If you just can't eliminate some air bubbles with tapping alone, puncture them with the tip of a sharp object, such as a pencil tip or toothpick.

Pour the rest of the plaster into the mould. Lightly tap the frame mould to level out the plaster. Position the wire for hanging in the wet plaster. Ensure that the loop of the wire is in the centre at the top of the frame.

Cover the plaster evenly with cling film. Allow to cure in a cool place for two or three days. Carefully take the plaster frame out of the mould. Allow the plaster frame to cure for four or five additional days before attempting to hang it.


You can use cooking spray instead of vegetable oil to prime your mould. If you have an elaborate frame mould that will not stay level on a flat surface while you are filling the mould, fill a small container with sand and press the mould in the sand to make it level. If you have difficulty removing the mould, apply heat with a blow dryer to relax it.

Things You'll Need

  • 2.5 cm (1 inch) wide paintbrush
  • Frame mould
  • Vegetable oil
  • Plaster of Paris
  • Water
  • 30 cm (1 foot) long wire
  • Pliers
  • Pencil
  • Cling Film
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About the Author

Dawn Sutton began her writing career in 2004 with an article on Internet counseling for a psychology journal. She writes numerous Internet articles on a variety of subjects including health, travel, education, crafts and much more. Sutton has published the books "The Manual" and "God's Girl" and numerous feature film scripts. She has a master's degree in social work from the University of Toronto.