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Registered Member #187
Joined: Thu Feb 16 2006, 02:54PM
Location: Central Ohio
Posts: 140
I think you mean how do I extract the ammonia from the latex. Ammonia is a gas, it will leave on it's own if left open to atmosphere.
In your case I think that the ammonia is required to keep the latex from curing. If you remove it or let it out, your latex will turn solid.
If you want to make a body mold you should use something non-toxic like sodium alginate, which is the stuff the dentist puts in those metal trays when they want an impression of your teeth. Aliginate is considered to be a type of latex but no one calls it that because "latex" is more of a trade name for something specific. It may even be a trademark name like "plexiglas".
Do a Google search and you should be able to find a tub of it online, and you might be surprised to find it in some health food store or pharmacy near your house.
Sodium alginate is a powder and you must add a specific amount of water to make a paste, which then solidifies after a few minutes.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi,
hydraliskdragon wrote ...
Today, I bought a Mold Builder for making negetive mold of my body.
When I opened the Mold Builder, I realized that the Mold Builder's latex had 50% Ammonia.
Does anyone know, how I can seperate the latex from ammonia?
looking at how this is used I'm a bit confused, could you explain what exactly do you want to accomplish?
You want to cast your whole body or a part of it?
Are you sure overall ammonia content is 50%, or that means something else?
The product doesn't actually appear to be 'rated' for use on human body, but liquid latex anyway used to create masks and I can't see why would it be too harmful.
One of bigger problems I can imagine is that if you use it on your body, I'm afraid latex is going to take most of your body hair as well!
Guessing shaving off the hair is not an option you'll either have to watch where you are using the stuff or wear something to protect you from direct skin contact with liquid latex. Maybe just kitchen PE foil would work?
If you want to make a body mold you should use something non-toxic like sodium alginate, which is the stuff the dentist puts in those metal trays when they want an impression of your teeth. Aliginate is considered to be a type of latex but no one calls it that because "latex" is more of a trade name for something specific. It may even be a trademark name like "plexiglas".
Do a Google search and you should be able to find a tub of it online, and you might be surprised to find it in some health food store or pharmacy near your house.
Sodium alginate is a powder and you must add a specific amount of water to make a paste, which then solidifies after a few minutes.
Meh, only the specific type of stretchy natural rubber is called latex as far as I know. The dentist molding stuff might work but I fear larger amount of it will be expensive according to this site:
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
From the minimal bit I learned watching mythbusters, the way they do it is to cast a mold using alginate, followed by plaster, they then take the alginate/plaster mold and fill it with another material, then replace the alginate with silicone.
Note that alginate won't be stable 'forever', I believe only on the scale of hours at most, so you'll have to replace the alginate with something else somewhat quickly.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
50% ammonia is likely a hell of an irritant.... any latex applied thick enough to make a mould will probably contain enough ammonia to cause a burn or something...
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Since a ssturated solution of ammonia is only about 35% this story doesn't make sense. If they have got that wrong why should you trust them about anything else?
Registered Member #509
Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329
Marko wrote ...
hydraliskdragon wrote ...
I am not actually very sure, how much ammonia is mixed in with the latex.
Im trying to make moulds of various parts of my body for ballistics and other things.
I was looking to buying alginate but Calgary doesnt seem to sell alginate.
Also for ammonia, is direct contact on skin for a prolong time cause any significant risk? 10% 20% 40% 60%
According to wikipedia, solutions over 5% ammonia are skin irritants, but I honestly disbelieve this stuff contains that much.
They use it widely for face masks and body paints, I'm unsure if this moulding latex is especially different in any case.
Any potential hazards should be imprnted on the package.
You can try it on a small portion of your skin to see if it irritates, and to see how much hair will it pull off.
Marko
but who says that its the same kind of latex, there are a lot of various kinds of CA glue, some meant for use on people/wounds, most not. I wouldnt be putting any over a large portion of your body unless its says its safe. Now a hand or a foot, I might give it a try if it didnt reek of ammonia, but still would work with it some on something else first to get an idea of what goes on with it.
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Extracting Latex from Ammonia
