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Replicating body parts in plaster

Replicating body parts in plaster
This is the first part of a two-part series on making a silicone replica of a body part. However, before we can make the silicone replica, we'll have to make a plaster replica.

*** WARNING: Because of the body part chosen for casting (in this case, a woman's breast), this Instructable may contain material considered offensive or objectionable to some readers. Viewer discretion is advised. ***
 
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Step 1Gather your materials

Gather your materials
To do this step you will need the following:

1) Dermagel - at least 2 pounds (or equivalent dental alginate)
2) Plaster - at least 2 pounds
3) Plastic container for placing body part inside of
4) 2 plastic mixing bowls - preferably with measuring lines (might get ruined)
5) Plastic cups for pouring materials
6) Duct tape
7) Metal whisk
8) Wooden mixing stick
9) Gram scale
10) Box cutter
11) Flathead screwdriver
12) An old towel
13) An assistant (optional, but highly recommended)
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229 comments
1-40 of 229next »
Aug 14, 2011. 9:52 PMraziz says:
it is wonderful.. if the tiny bumps bothers some people, it was just caused by trapped air bubbles, rubing some alginate onto the skin before you pour should help...
Apr 26, 2012. 1:15 PMdesmondtheredx says:
or put it into a small vacuum space
Apr 16, 2012. 7:43 AMdanzo321 says:
great solution
Apr 26, 2012. 1:13 PMdesmondtheredx says:
Is she wearing boxers?
She looks more like a guy to me
Apr 16, 2012. 7:47 AMdanzo321 says:
Didn't you say you were going to silicone-cast it?
Apr 16, 2012. 7:45 AMdanzo321 says:
It may feel heavier but not possible to get heavier. How would that happen?
Apr 16, 2012. 7:42 AMdanzo321 says:
Might as well stick your mold back in the plastic cup to keep its shape while casting it. Your plaster is way too thick, that traps air pockets.
Apr 16, 2012. 7:40 AMdanzo321 says:
To avoid air bubbles you want to work with thinner alginate, 'scrub' the breast with a gentle tool while submerged, and your plaster should be like tomato soup when you first mix it, not like toothpaste.
Apr 16, 2012. 7:31 AMdanzo321 says:
I think I'd go with faster set time/warmer goop.
Apr 16, 2012. 7:28 AMdanzo321 says:
It is normal to mix the alginate with tepid water!
Dec 4, 2008. 5:18 AMBooche says:
D, how would you recommend doing nipple only? Method & Materials? Thanks!
Apr 16, 2012. 7:25 AMdanzo321 says:
A shot glass and alginate to fill..
Jul 15, 2011. 4:34 PMShany120 says:
is that duct tape?
Mar 7, 2011. 1:43 PMNeuroPulse says:
She does not seem to have a left nipple?
Nov 6, 2008. 4:18 PMseeem says:
Honestly you're much better off getting someone to apply it by hand, you'd get rid of all those awful air bubbles. If you're casting a small area like a section of chest, you could even get away with trying a warmer mix to try and minimise the goosebumps.... although normal alginate goes off far quicker with heat.
May 16, 2010. 4:34 PMseabananers says:
it ain't always small if you know what im sayin
Apr 14, 2009. 12:04 PMHelos says:
I wonder if using a whisk adds most of air bubbles to the alginate mix, that's the whole idea of using them in cooking. I seem to remember my orthdontist using something as simple as a tongue depressor or popsicle stick to mix it.
Apr 9, 2010. 3:28 PMfragmaster4 says:
New Bra style  :P
Mar 7, 2010. 1:15 PMAzayles says:
I can tell the poor girl was cold. That robot sticker isn't exactly laying flat on her areola

<.<
Mar 11, 2010. 8:24 AMgolddigger1559 says:
 those nipples look like they could slice through hardened steel like it was butter (not to be a derogatory phrase just making an educated observation)

but seriously how cold was it in there? i could not tell if it was winter outside that garage 
Dec 24, 2008. 2:36 PMjoe999999 says:
This is a wonderful idea. Do you have any advice on using this method to mold body parts found between the legs? In the case of such parts of one particular "gender", there is the added problem of maintaining "attention". In the case of another particular "gender" there is the problem of leakage of the dermagel into the body.
Dec 14, 2009. 7:41 PMoctopuscabbage says:
*Warning offensive straight forward language coming*

If your gonna mold your husband/boyfriends man part dont. its not worth the time. just buy a dildo. itll be bigger better. Plus u wont damage his weiner.
Jan 24, 2010. 8:58 AMtartinde says:
You can also use dental aglinate.  It's the same stuff the dentists uses to make a mold of the inside of your mouth, it's fast setting, made from algee so it won't damage him.  You can find fast setting so the time will be quick.
Sep 4, 2009. 5:38 AMchibiwind says:
this chick is dangerously skinny, seriously like dangerously slim.
Jun 27, 2009. 12:58 PMdert says:
In the case of one gender, attention can be met with the assitance of another gender. or try viagra which will certainly last longer than 15 mins
Mar 19, 2009. 4:42 PMgirrrrrrr2 says:
um... i do not wanna know more... but you can prob use some Santa's little helper to maybe keep up... and have a girl keep your attention... the other one... maybe use tape...
Mar 21, 2009. 7:28 PMidogis1 says:
I wouldn't use tape, just mix the alginate to a thicker consistency.
Mar 29, 2009. 11:33 AMgirrrrrrr2 says:
that would work too.
Aug 5, 2009. 4:24 AMrasta_bhoy says:
use the ** ring ;)
Jan 5, 2010. 4:52 AMQuintin Erasmus says:
What proffit in persuing the artist?
Dec 21, 2008. 2:23 AMKasaron says:
Is there any way to heat the dermagel, or will that make is unstable? I figure if the gel was at least warm it might be a little less uncomfortable...
Nov 30, 2009. 9:24 PMaoriodoragon says:
you wouldn't get the pokey nips if you pour warm liquid on em. Keep it cold for perfect moulds! 
Sep 29, 2009. 10:28 PMolivierduhamel says:
there are detailed info on the subject on
http://www.bodyscape.net/handbook.htm
Sep 8, 2009. 4:29 PMbrandon borick says:
losse the sticker
Jun 27, 2009. 12:14 PMWard_Nox says:
Warning: Plaster can get INSANLY hot when it begins to harden which is why the markup studios stopped using it to make casts for doing prosthetics
Jun 19, 2009. 5:16 PMBEAST14 says:
lol
May 29, 2009. 10:45 AMgora_ji says:
Please remove the "WARNING":" - THAT is the offensive part. A woman's breast is in no way offensive. If people have a problem with seeing them, then they ... have a problem!
May 28, 2009. 10:13 PMPeabo_1 says:
I do quite a bit of body casting for random things, you should try:<br/><br/><a rel="nofollow" href="http://www.smooth-on.com/Life-Casting-Body-/c3_1184/index.html?catdepth=1">http://www.smooth-on.com/Life-Casting-Body-/c3_1184/index.html?catdepth=1</a><br/><br/>Stuff is amazing.<br/>
May 7, 2009. 6:06 AMjsollien says:
This girl got some ripped armed. I wish I had triceps like that, and I'm a dude.
Apr 25, 2009. 7:18 PMDragonX777 says:
Holy crap she posted that, not any guy but her.
1-40 of 229next »

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