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Picture of Body Casting and Chocolate Molding
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AKA Chocolate breasts!
Searching for that perfect, unique, one-of-a-kind gift?
Give yourself -- in chocolate!
Using body-safe silicone and chocolate, you can reproduce whatever strikes your fancy for your loved one to nibble on anytime. It's a work of art that's meant to be enjoyed!

The mold you make with this method can be used to cast any variety of materials.

This would also be a great way to commemorate an expecting mother's pregnant belly!

*** WARNING: This Instructable may contain material considered offensive or objectionable to some readers. Viewer discretion is advised. ***
 
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Step 1: Materials

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For this project I used:

  • Two trustworthy assistants - one to smear and one to photograph. You may decide you only want the one.
  • 2 qt. Dermasil - SR1100 Silicone RTV material that can be brushed directly onto the skin

This silicone is only rated as body-safe. It has not been FDA tested to be food grade.
I promise to report if I poison anyone with the chocolate from this mold.

  • Petroleum jelly
  • Plaster bandages
  • Chip brushes
  • Disposable mixing cups in two different sizes
  • Stirrers
  • Chocolate - best to use baking chocolate, rather than chocolate chips. After some testing, I discovered the taste and texture of remelt baker's chocolate to be FAR superior to that of chips.
  • Double boiler or two pans
  • Scissors

Step 2: Prepare Silicone

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This particular silicone is mixed in a 1:1 ratio by volume.

Since it has about a 15 minute pot life, it's best to prepare smaller sized-batches to be used as you need them, if you are casting a large area.

Use small cups to measure out even amounts of each of the parts.
Line these up near larger mixing cups with stirrers and brushes nearby.

Step 3: Prepare skin

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Apply petroleum jelly liberally to surface to be cast.
This will allow the silicone to pull away easily from the skin once set.
Make sure to pay SPECIAL attention to any areas with hair. Even tiny, almost invisible hairs. You will be surprised how many of these you have.

Step 4: Mix Silicone

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Pour one of each part of the silicone into a larger mixing cup.

Stir with mixing stick until the substance is an even color - no streaks!

Step 5: Smear on the silicone

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This is a good time to employ trustworthy assistant #1, unless you can reach all of the areas yourself.

We found that we had less trouble with air bubbles by using our hands for the first layer.

Also, it was best to go over each area just once, as trying to go back over it to add more or even it out ended up actually removing some of the silicone. Very frustrating, and added weird flaws in the final cast.

Once this layer is set - about 15 minutes- it will be dry to the touch.

Mix up your next batch of silicone and spread on top of the first.
Silicone will stick to silicone, so you don't have to worry about that.
This is the time to pay special attention to the areas that might need more reinforcing - edges and undercuts. It's easier and less messy to employ chip brushes for these layers.

Repeat until you feel you have a good, sturdy mold. Or until you're out of silicone.

Step 6: Apply plaster bandages

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Cut the rolls of plaster bandages into manageable sizes

Fill one of the larger (unused) mixing cups with water.

Dip strips of bandage into cup and squeeze out excess water.

Open up strip and apply on top of silicone.

Do this until the surface is covered and let dry.

Repeat repeat repeat.

My plaster shell wasn't nearly sturdy enough, and great mess ensued when it came time to pour the chocolate.
*sigh*

Step 7: Remove the mold

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GENTLY remove the mold from the subject.

In most of my testing, I discovered this silicone creates a tight vacuum-like seal to the skin.
Release the seal around the edges first, and take it slow.

The plaster shell can be removed first if the two don't want to come off together. If you do this, take care to shift the silicone mold around in the plaster shell when realigning to get the right fit.


The silicone needs to cure 16 hours before you can pour anything into it. Wash it with soap and water and let it sit.

Step 8: Day 2 - Melt chocolate

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Now that your mold is clean and dry, it's time to prepare your casting materials.

I opted for bittersweet chocolate and used about 4lbs of it. I wish I'd used at 5. Don't skimp, or your cast may break apart later.

I did my best to temper the chocolate and mind it's temperature. Though the end result didn't show sugar blooms, it still had a weird surface texture. I'm not sure if I did something wrong in the melting/pouring process, or if I can blame the silicone for this.

I will choose to do latter.

TO TEMPER YOUR CHOCOLATE:

You will need two pots or a double boiler, a candy thermometer, a rubber spatula, and chocolate chopped into small pieces. Be careful not to get any steam or water in your chocolate, or it will all be ruined!

Melt 2/3 of the chocolate in the double boiler over hot, but not simmering, water that is not touching the bottom of the container holding the chocolate. Don't let the water get too hot; chocolate reacts horribly when it's too hot.

Melt the chocolate until it reaches a temperature of approximately 113oF/45oC. Remove the chocolate from the heat.

Beat in the remaining 1/3 of chopped chocolate, letting the mixture cool to approximately: 88oF/31oC for semisweet chocolate, 84oF/29oC for milk chocolate, and 82oF/28oC for white chocolate.

The chocolate should be smooth and glossy. Hold it at that temperature by moving the container on and off the hot water while you dip or mold your chocolate.

Step 9: Pour chocolate into mold

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I did this in steps to make sure that each layer would get a chance to set, and to reduce the chance of air bubbles.
I'm not sure this was the best method. The reheating of the previous layers by the addition of new chocolate may be what caused the weird texture in my final product.
I plan to do more testing and will definitely post my results. I'll need to get some bigger pots.

Using a chip brush left brush strokes and fibers in the chocolate. Pouring and turning the mold to make sure everything was covered was a better method.

After building up a few layers, I did use a brush to add more chocolate to the edges and weaker points.

Step 10: Demold

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Once the chocolate's set, you can demold your cast!

Remove the plaster shell and set aside

Slowly peel back the silicone to reveal your masterpiece!

I tried a bunch of different stuff to smooth out the surface, but I really wish I'd just left it alone.
In the end, it wasn't sturdy enough to stand up to all my manhandling and started to fall apart. Perhaps I shouldn't have filled in those undercuts quite so much. . .

Also next time I'll use confectioner's coating instead of real chocolate. I'm ordering some now!

Hope this was a fun Instructable!
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Great Instructable! Since the 1990's I've been in to the fine arts, and just recently started studying Plastic Technology over in my local community college. I was surprised to learn that the community college is the ONLY one as such in the Southern CA area! We learned to make all sorts of great reusable plastic molds, FDA approved molds, etc. You've given me an idea to make some chocolate goodies using fine art sculpting first and then creating a reusable rubber mold of my models to create Fine Chocolate Art! Thank you!

I look at this as no different than nude art,,, some of you people just look at the obvious,,, someone that worked art, and shows it in a museum is no different than what was posted here... I THANK YOU MISSCHIFF, for posting something respectfully, and giving me numerous ideas for my business.... trust me,,, this will sell awesomely during christmas and birthdays for hubbies..... my mother used to make cakes, and made this same thing out of cake, and cupcakes,, then, she even made the bottom for a man,, using a twinkie as you know what,,, its comical, its romantic, its something people will buy,,, so, keep up the good work,,, and thank you again...

There are FDA approved food safe ways to accomplish the same thing. Only a little more work and pennies. I have been doing the same stuff for some time. Let me know if I can help.
Dustycookie2 years ago
You really didn't have to post that picture. It could have been, like, you jellying up your shoulder and facing away.
knuckel5 years ago
 i want to make a cast of my head, how would i do this, i would do the breast however i am male, and not mutch mussel to be prod of "yet" so that is out of the question.
stick two straws up you're nose and then you can still breath, fill in the nostril holes with something like Plasticine
if you can hold your breath till the gelatin sets, you've got it.
gomas2113 years ago
i wanted bobbies
Screamo4 years ago
Is that your body in chocolate? o.o
Why can't I just rub chocolate all over myself?
cloroak4 years ago
if you look just abouve the plastic jar...
Saturn V4 years ago
*in awe* (Gasp!) That's a lot of chocolate.
Cooooooooool.
bobert6106 years ago
you guys are pervs, you know that?
 haha then what are you doing here?
so ....if the female body makes u think that any attraction towards it  makes u a perve ....then u my sir  have issues
pyro8885 years ago
who's the lucky guy?
GnomeMaster5 years ago
OMNOMNOM XD
Dr.Big5 years ago
awsome
dogsgomoo5 years ago
Yum and sexy gift idea. Though I have to ask... did the chocolate taste weird from the silicon? This technique has given me an idea for doing my dress form but I'm wondering, how much did that much silicon cost?
nice breasts, if its not out of line. =)
chewymst5 years ago
would it be fare to say you have chocolate flavored nipples? lol
akinich5 years ago
nice brests whose are they?
wow thos is weird but awsome is that your wife, girlfriend, sister, etc. any one willing to let you rub there breasts with chemicals
ninjaknow6 years ago
nice
dawning6 years ago
Extremely delicious. Perhaps I'll have to attempt something like this, but maybe I'll use some other candy-ish materials.. Decorating could be freakin fun too.
snelpiller6 years ago
wooow, thats alot of chocolate!! like, alot alot
snelpiller6 years ago
again
Warning Mature content!

and again, not that I mind tho =)
snelpiller6 years ago
oh my dais! Ill just put this in for former visitors
!!WARNING!! Mature content

Not that I mind tho =)
Boomer6176 years ago
To make it shine you must also add air to the chocolate by lifting the spoon and letting the chocolate run off.
MissChiff (author)  Boomer6176 years ago
Ah, I didn't know that.
canis6 years ago
the vaseline is harder to remove than you would think. that would cause some blooming. also, a good demolding agent is helpful in preventing blooming. i would recommend coating the inside of the mold with paraffin - melt it and spray it on with a mouth atomizer, perhaps?
canis canis6 years ago
actually, you could just pour hot paraffin into the mold and swirl it around, then pour the excess back into your wax pot.it will also give the final piece a nice, glossy sheen, without affecting edibility.
MissChiff (author)  canis6 years ago
Great suggestions! Thanks!
Crakur canis6 years ago
yea, but it also affects the flavor, look at hersheys compaired to lindt, one has more parafin, and therefore a different flavor
eggmcmffn6 years ago
looks like a mummy
Traceur2216 years ago
why don't you move that hand a little?
fedecale6 years ago
I wish i were u
leepinlarr6 years ago
I wonder if you would have iced her back during the process, if her nipples would have stood up more, creating a perkier mold
playahboy6 years ago
Whoa, nice breasts, make an instructable about how to mold a body
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