Instructables
Picture of How to Make a Fake Hand
Previously on Indy Mogul, we showed you how to make a fake head for your indie filmmaking needs. This week we have the recipe for a fake hand! We are always looking for new projects like these at Indy Mogul, so send in your ideas! And don't forget to subscribe to our podcast on iTunes!

Shopping List

1. 16 lbs. plaster of paris.
(8 lbs for the top half, 8 for the bottom. )

2. BFX ballistics gel.
(Check out this Weekend Extra for more details.)

3. Liquid latex.
(In a flesh tone.)

4. Caulk.
(Does not need to be adhesive.)

5. Petroleum Jelly.
(As a de-molding agent. You could also use cooking spray.)

6. Duct tape.
(I'm going to stop listing this because you should always have some ready.)

7. A cardboard box.
(To add some "fleshyness" to the face.)

Step 1: The Mold (Part 1)

Picture of The Mold (Part 1)
2.jpg
This process takes several stages, but is fairly simple. First cut a notch in one end of the box. Then tape up the bottom and sides.

Next mix up half your plaster, which should be about 8 lbs for a hand mold. As mentioned by Jared, use a little more water then recommended. Cover your subjects entire hand and arm (anything going into the plaster) with petroleum jelly. Now pour your plaster into the bo. It should be about 3-4 inches deep. Place the bottom half of your hand into the plaster and rock it back and forth to get it to sink in. Don't put your hand too deep into the plaster.

Step 2: The Mold (Part 2)

Picture of The Mold (Part 2)
4.jpg
After about 15-20 minutes you should be able to remove your hand. Shortly after this the mold will start to get very warm. This is normal.

Once the bottom half is dry, you can move to the top half. Apply more petroleum jelly to the bottom mold and your actors hand. Mix up some more plaster and place hand back into mold. Pour the new plaster over your hand and the bottom mold. Wait the some amount of time for this layer to dry.

 
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skaar3 years ago
how about painting the inside of the mould with the latex first? then add the gel...
if you were to paint the two halves of the mold before you poured the ballistics gel there would be a seam that would be fairly unattractive, though painting it on isnt very smooth either, theres always the option of buying a larger ammount of latex and dipping the gel hand into that but ive not much experience.
i was thinking that it could be poured into the mould, and the latex rotated around it, then pour out.
I was thinking the same, seems like a great idea.
tinker2342 years ago
wow you know your brain epsiode got me thinking the mould and silcone could mean a prop thats is usable over and over
skaar3 years ago
how about alginate, it cures fast, pour it on the hand, wrap some plaster soaked gauze around that, when it cures, slit it up the side...
ezginori3 years ago
Thank you for the instructable. It was the only good instructable to take the mold of my hand usuing plaster. I must admit at first I didnt take your measurements seariously. I mean that much of plaster, then I was struck by the reality, I didnt have enough plaster for the top, so it broke. So everyone, you really need that much, not less. In addition, there are three details I would like to point out about molding: One is to be careful while choosing the plaster of paris. There are too many types, the fast drying one is the one for repair. The other thing is the hint of mixing the plaster. Always put water in to the container first, then cup by cup add the plaster. So you wont have lumps. The mixture will be saturated eventually.It has to get a yogurt type of feel. Since it dries really fast you have to be quick. The last thing is, that you mix the plaster always in the same direction. For ex. clocwise. If you mix it with towards both directions, your plasters quality will be poor. So it can crack or break easily. I hope these hints are helpfull. Thanks again.
Rye6 years ago
Can i use this for a jello mold?
Kankuro Rye5 years ago
i'd think so, as long as you put plastic wrap or tinfoil inside the mold first.
Thenwcp Kankuro5 years ago
HAHAHA JELLO FOOT
Argool Thenwcp5 years ago
I could use this to make an edible fake hand! this year's halloween costume: Jelloman
Fashim5 years ago
Lol Awesome im gonna use this to beat people lol
hey, do you put your hand in cardboard box full of plaster and then let it sit till dry then pull out your hand?dont get mold making.can somebuddy help please?! S.O.S LOL! but really can someone break it down for me soon please?
komal005 years ago
this stinks
pipotoy20046 years ago
It's great with zombie makeup!
bethehammer7 years ago
Is that wire inside the fingers? Is that to make it stiffer? What is the shelf life of the limb? It looks like you are using knox gel, isnt that a food product?
I'm in the process of creating ears for a bi-naural sound project. I have the plaster molds of my ears (which hurts a lot, btw) but I'm also curious about how long knox gel will last. Heck, maybe I'll use latex caulking to fill them in and use that as the mold...
can you save on plaster(and make the mold lighter) by pre-filling the dead areas of the mold with scrap styrafoam? or would this increase the likelyhood of the mold cracking?
WurdBendur7 years ago
I never bothered to use anything like caulk on a plaster mold. A big rubber band will hold it well enough, or you can just tie it, or tape it, or whatever. Also, adding the caulk will create extra space between the halves of the mold, which you don't really want. So is there a particular reason you use this? Does your ballistics gel tend to leak out a lot?
Robot Boy7 years ago
If you're going to make two halves of a mold, maybe you could poke some finger holes around the outside of the hand to line up the two halves when they're done.
Darkshot7 years ago
how long this take you?
JakeTobak7 years ago
Where can I get the Ballistics gel?
I've made ballistics gel out of Knox brand geletan.
Here is the link on how to make it. It will melt after a while though so keep it in the fridge when not in use. http://www.myscienceproject.org/gelatin.html
You can also buy Real gel from a movie FX company. It's about $350 for a 50 lbs. bag.