Replicating body parts in plaster

 by donnauwanna
Featured
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 1: Gather your materials

casting01.jpg
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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fxguy2000 says: Feb 10, 2013. 11:05 AM
if you want to reduce the amount of alginate you use you can always use plaster bandages for backing and to reduce bubbles try not to whip the alginate before applying it on the body. oh and for the person that asked about casting the lower extremities it is very possible but time is limited!!!! you can do a man but you have to prepare a container ahead of time and have him at full attention when the alginate goes on because it can be quite cold. you are also able to buy these kits on line complete with instructions. hope this helps
mayej says: Nov 18, 2012. 10:20 AM
Hahaha, great choice of sticker.
Nice touch.
desmondtheredx says: Apr 26, 2012. 1:13 PM
Is she wearing boxers?
She looks more like a guy to me
GaseousMotordong in reply to desmondtheredxOct 1, 2008. 5:13 PM
How is that in ANY way way relevant to ANYTHING? Seriously, guy...
raziz says: Aug 14, 2011. 9:52 PM
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...
desmondtheredx in reply to razizApr 26, 2012. 1:15 PM
or put it into a small vacuum space
danzo321 in reply to razizApr 16, 2012. 7:43 AM
great solution
danzo321 says: Apr 16, 2012. 7:47 AM
Didn't you say you were going to silicone-cast it?
danzo321 says: Apr 16, 2012. 7:45 AM
It may feel heavier but not possible to get heavier. How would that happen?
danzo321 says: Apr 16, 2012. 7:42 AM
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.
danzo321 says: Apr 16, 2012. 7:40 AM
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.
danzo321 says: Apr 16, 2012. 7:31 AM
I think I'd go with faster set time/warmer goop.
danzo321 says: Apr 16, 2012. 7:28 AM
It is normal to mix the alginate with tepid water!
Booche says: Dec 4, 2008. 5:18 AM
D, how would you recommend doing nipple only? Method & Materials? Thanks!
danzo321 in reply to BoocheApr 16, 2012. 7:25 AM
A shot glass and alginate to fill..
Shany120 says: Jul 15, 2011. 4:34 PM
is that duct tape?
NeuroPulse says: Mar 7, 2011. 1:43 PM
She does not seem to have a left nipple?
seeem says: Nov 6, 2008. 4:18 PM
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.
seabananers in reply to seeemMay 16, 2010. 4:34 PM
it ain't always small if you know what im sayin
Helos in reply to seeemApr 14, 2009. 12:04 PM
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.
fragmaster4 says: Apr 9, 2010. 3:28 PM
New Bra style  :P
Azayles says: Mar 7, 2010. 1:15 PM
I can tell the poor girl was cold. That robot sticker isn't exactly laying flat on her areola

<.<
golddigger1559 in reply to AzaylesMar 11, 2010. 8:24 AM
 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 
joe999999 says: Dec 24, 2008. 2:36 PM
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.
octopuscabbage in reply to joe999999Dec 14, 2009. 7:41 PM
*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.
tartinde in reply to octopuscabbageJan 24, 2010. 8:58 AM
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.
chibiwind in reply to joe999999Sep 4, 2009. 5:38 AM
this chick is dangerously skinny, seriously like dangerously slim.
dert in reply to joe999999Jun 27, 2009. 12:58 PM
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
girrrrrrr2 in reply to joe999999Mar 19, 2009. 4:42 PM
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...
idogis1 in reply to girrrrrrr2Mar 21, 2009. 7:28 PM
I wouldn't use tape, just mix the alginate to a thicker consistency.
girrrrrrr2 in reply to idogis1Mar 29, 2009. 11:33 AM
that would work too.
rasta_bhoy in reply to girrrrrrr2Aug 5, 2009. 4:24 AM
use the ** ring ;)
Quintin Erasmus says: Jan 5, 2010. 4:52 AM
What proffit in persuing the artist?
Kasaron says: Dec 21, 2008. 2:23 AM
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...
aoriodoragon in reply to KasaronNov 30, 2009. 9:24 PM
you wouldn't get the pokey nips if you pour warm liquid on em. Keep it cold for perfect moulds! 
olivierduhamel says: Sep 29, 2009. 10:28 PM
there are detailed info on the subject on
http://www.bodyscape.net/handbook.htm
brandon borick says: Sep 8, 2009. 4:29 PM
losse the sticker
Ward_Nox says: Jun 27, 2009. 12:14 PM
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
BEAST14 says: Jun 19, 2009. 5:16 PM
lol
gora_ji says: May 29, 2009. 10:45 AM
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!
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