Introduction: Simple Clay Mold

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This is a very simple and fast mold for casting plaster or epoxy. I'm sure the picture explains it all, but to make things all good and proper, I'll go through it step by step.

NOTE: This isn't my idea, I'm just reposting it, because I think there are many more applications for this technique. The idea comes from Hirst Arts Fantasy Architecture. If you are interested in this project, I suggest you go take a look there at www.hirstarts.com

Step 1: Push in Original

Picture of Push in Original

Push the original object you want to cast into the clay and pull it out.

Step 2: Pour

Picture of Pour

Pour the plaster or epoxy into the mold. I used Durham's Rock Hard.

Step 3: Let It Dry

Picture of Let It Dry

Let it dry and peel it out. Bam!

This technique isn't super precise, so you might need to do a little clean-up.

Comments

cutting Matt (author)2009-02-01

would the clay mold get distorted as you take out the casting?

blksheep (author)cutting Matt2009-02-02

It does a little. I just try to be very delicate when pulling anything out of the clay. If it deforms too much, I just knead the clay and try again. This really isn't a super-precise way to cast things, but it is fast, easy and cheap, so it does have an upside.

RobinD64 (author)blksheep2016-05-08

Ok I wanted to make a mold out of like plaster of Paris of star wars figures so I need the details. Then I want to make clay figures with the molds. How would I go about doing this. Getting as much detail as I can and not damaging my original figures.

cutting Matt (author)blksheep2009-02-05

good point! its also reusable! for double sided castings could you just cast both sides and glue them together?

blksheep (author)cutting Matt2009-02-09

Don't see why not.

RobinD64 (author)2016-05-08

Ok I wanted to make a mold out of like plaster of Paris of star wars figures so I need the details. Then I want to make clay figures with the molds. How would I go about doing this. Getting as much detail as I can and not damaging my original figures.

inlina (author)2014-05-15

What type of clay is used for this?

edward32214 (author)2010-04-11

Whenever your making a mold, i think it would be easier to cast from a flat surface for a more accurate copy. For instance containing your clay in an box and smoothing out the top before casting the plaster or epoxy. Also to have a super accurate copy split your clay and box in half, push in you model get a tube of some kind like a straw and push that adjacent to your model close and fill.

elkalpin (author)2010-02-21

NICE!!! simple yet effective!

Sunny124613 (author)2008-09-01

ok this is cool,ZIm gonna make one but make ice cubes instead!!!

GorillazMiko (author)2007-11-24

awesome instructable :-)

John Smith (author)2007-11-24

Good instructable. You can also cast in lead, like in my instructable. (excuse any grammar or spelling mistakes in mine, that was a couple years ago.)

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Bio: In a past life I was a scenic designer, living in New York and building plays and fashion shows. Now, life has slowed down a ... More »
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