Big Ceramic Store Blog

How To Make and Use Slump Molds

If you read our post on Wednesday, you learned all about making and using hump molds. Today, we are going to go over, making and using slump molds.

They both give you similar results, however; they are achieved in different methods. With a hump mold, you drape the clay over the outside of the mold to shape it, and with a slump mold, you drape it inside.

So, how can you make a slump mold? Use your imagination and create unique and personalized molds, or go plain and simple, and use a bowl or a bowl and some plaster.

How creative you get is up to you, but today, I'm going to show you plain and simple.

1. Let's start with easiest slump mold of all... no assembly required!

  • Go find a nice size bowl in the kitchen cupboard, grab yourself a roll of clear plastic wrap (or a sheet of newspaper print paper), and take them to your design table.
  • Roll out a slab of clay.
  • Decorate it, and cut it into the shape you want.
  • Transfer it onto the plastic wrap or newspaper sheet.
  • Pick it up, and place it in the bowl you chose.
  • Let it dry to "leather hard", remove it from the mold, and transfer it onto a ware board or shelf to dry. (this is the perfect time to add feet if you want)

2. Slumping just to get a "warped" effect on plates and platters.

  • Get yourself a nice sized box, and an old sheet, or a piece of textured fabric.
  • Attach the fabric to the box. The tighter the fabric, the less warped your piece will be.


  • Roll out a slab of clay.
  • Cut the shape you want.
  • Toss it into the box (on top the fabric)


  • Again, let it get leather hard before you remove it, or put feet on it.
  • Add nubs for attaching wire if you want this to be a wall piece.

3. Now the tougher one... Make a slump mold with a bowl and plaster.

  • Find the bowl you want for a template.
  • Lay a trash bag, or other heavy plastic sheet, on the surface you work on.
  • Place your bowl, upside down, in the center.
  • Create outside walls with wood, heavy cardboard or plastic/vinyl sheets (like plexiglass).
  • Mix the plaster.
  • Pour it in the form you've created.


  • Allow it to set up and remove the outside walls.
  • Flip it over and remove the bowl.

This is the fun part! Create amazing and unique pieces with your new molds. You will find them indispensable!

Do you have an idea or project you'd like to share, or would you like to try your hand at writing an article for us? Shoot us an e-mail at

Look for more great ideas on the "How-to" page of our website.


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