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Mexicanbat Profile
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Registered: 02-2004
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Re: Casting materials


yes you can cast urethane in ultracal but you need to seal the mold because it is pours
but yes you can
 

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The Real Mexicanbat
4/25/2009, 7:21 pm Link to this post Send Email to Mexicanbat   Send PM to Mexicanbat MSN Yahoo
 
NOCTURNALKNIGHT Profile
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Registered: 04-2009
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Re: Casting materials


Ok,
I have a question I am about to go and make a head cast of myself, just curious on what is the best material to use for casting, and whats the best material to use as a filler so I can start sculpting my own cowls.
I did some clay over a fake head for practise, but now I have a little extra dough and want to try it for real.
Any suggestions will be most appreciated.
I mean we all got to start some where.
Thanks
5/6/2009, 7:50 pm Link to this post Send Email to NOCTURNALKNIGHT   Send PM to NOCTURNALKNIGHT
 
DeepArchitecture Profile
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Re: Casting materials


There's a few routes you can go with lifecasting. you will need someone to help to mold your head.

The initial detail layer of your lifecast can be made from either Alginate or Body Double (a product from Smooth-On, its a brush on fast setting silicone which is skin safe)

once you have a basic mold made you make a mother mold for the silicone or alginate using plaster bandage.

In an alginate head mold you can pour in plaster or ultra-cal to get a bust to sculpt on. You could also use resin, but you would need a very fast setting resin. Ina body double mold you can cast pretty much any material you want.

Each material has its own benefits, alginate is considerably cheaper, pretty easy to use, but it is also highly destructable. It rips easily and you have to cast into it pretty much right away, because as it dries it will shrink up and deform, and you'll be left with a pretty freaky voodoo looking headcast. you will likely get one, or maybe two uses from an alginate mold before its damaged beyond useability.
Body Double is much more expensive but it has a much better shelf life. because its silicone you can use it many times over and over to produce casts.

Hope that helps dude, if you have any other questions just post 'em up.


Deep Architecture
5/9/2009, 11:37 am Link to this post Send Email to DeepArchitecture   Send PM to DeepArchitecture
 
NOCTURNALKNIGHT Profile
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Re: Casting materials


Thank you very very much, I totally appreciate this and Im gonna be on my way to doing this, like hopefully this week, but i will keep you posted as well as pics.
Thanks again.
5/9/2009, 12:56 pm Link to this post Send Email to NOCTURNALKNIGHT   Send PM to NOCTURNALKNIGHT
 
NOCTURNALKNIGHT Profile
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Re: Casting materials


Thank you very very much, I totally appreciate this and Im gonna be on my way to doing this, like hopefully this week, but i will keep you posted as well as pics.
Thanks again.
5/9/2009, 12:56 pm Link to this post Send Email to NOCTURNALKNIGHT   Send PM to NOCTURNALKNIGHT
 
RevolutionImages Profile
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Re: Casting materials


NOCTURNALKNIGHT,

For my first cowl i made a lifecast just using plaster bandages. my girlfriend did it for me, i made sure i vaselined my skin beforehand, eyebrows especially. and i covered my hair with tightly taped down saran wrap. (which you could use a bald cap, i just didnt get one, so i went cheapie on it. or anything to cover up your hair)

She started with the back of me first, appling in single layers, she created the back half of the lifecast shell. after the back was created, she vaselined the seam so that when the front was done, we could easily separate the two halfs and not have them lock together. overall each half, front and back, was a total of 3 layers of badanges thick.

waited about 15 minutes and then removed the shells.

Surprisingly the plaster bandages caught alot of detail, and it was cool to look at it. So my plan was to create a positve from that casting on which to sculpt. i really dind't know what i was doing at the time, because i ruined my first lifecast by pouring plaster of paris into , which only softened the bandages. poop job! So i wanted to avoid that case, and turned to useing the expanding foam in a can, think i could create a postive made form foam to sculpt on. well it worked, sorta... that foam sticks to everyhing, including the inside of my lifecast. but after it was done, i realized, hey, i can just sculpt right ontop of the bandages (as they pretty much look like my head anyway) so i went away at it and thats how i did my first cowl.

For something like a cowl that doenst require exact skin detail, i wouldn't waste money on silicone body double. save it for your womans breasts instead. but if you want to use alginate you should do it. the way ive seen it done is alginate the face, and just make the rest from plaster bandages, meaning the back doesnt get alginate, just the front. hope that all made sense.
5/10/2009, 6:11 am Link to this post Send PM to RevolutionImages
 
NOCTURNALKNIGHT Profile
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Re: Casting materials


Sounds cool,
I have a buddy thats gonna help me out. But I know its trial and error, but I just want to be able to do the jhob right the first time.
I never thought of using saran wrap, sounds like a good idea, since i have no clue on where to get a bald cap.
Does all art shops have the basic materials I neec for the cast? I know or think Smooth- on, has its own company.
I totally appreciate the help on this thanks again!!
5/10/2009, 2:40 pm Link to this post Send Email to NOCTURNALKNIGHT   Send PM to NOCTURNALKNIGHT
 
Mexicanbat Profile
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Re: Casting materials


for the life casting you should try this guy
 http://www.brickintheyard.com/training.html

or try this page

http://www.youtube.com/profile?user=brickintheyard&view=videos

good luck bro

---
The Real Mexicanbat
5/12/2009, 12:05 am Link to this post Send Email to Mexicanbat   Send PM to Mexicanbat MSN Yahoo
 


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