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Diane Rossong
Joined:
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13-Sep-2005
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Started On : 29-Sep-2009 at 04:57:21 PM, #Views : 5896
Topic Subject : Re: Re: Re: Re: Re: Pregnancy cast |
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I did that one in 2003 and put it on my website in 2006.
The hands turned out way better then the belly, not knowing what I was doing, I almost filled the belly with gypsum, I later had to take a grinder to the inside and hollow it out a bit so it didn’t weigh so much.
It sounds like you have had some practice for it.
It does take courage to submit to this website, afraid of ridicule …
But recently there has been a ton of interaction, I think for about a year no one really used it, it’s great to see people using it again.
It looks like your mold collapsed a bit.
I can only say what I do, and my experience with different products has been important for me.
When I first started doing this I used a pretty expensive dental gypsum, then found out about Hydrocal white, even though it is quite a bit weaker the cost is way cheaper.
One thing that is good to know, is that if you take the dust of precast gypsum (from sanding) and put it in your mix for the mother mold it will accelerate the cure time. I found it was great when I was using the stronger gypsum, but when both powers were from the h-cal it seemed to weaken that mixture (to me) and I only had to experience one of my belly castings to spread out of shape because the mother mold was too weak.
I also had no idea how much of this powder to put in the mix, it either set too fast or too slow.
So this is what I do now.
When the alginate is almost set I put on some fluffy fibers on them, then mix up a batch of the silky rock ( 13,000psi) it is also a fast setting gypsum 10 min set. and then put it on with a paint brush in the areas that need to be the strongest to hold it’s shape like around all sides (pregnant belly) especially under the belly and around it under the breasts. Then a thinner layer everywhere else. I get some cheese cloth, I don’t like plaster bandages because I feel they are not strong enough, they are too small, but the big reason is because it takes too long to work and put on the mould properly. I have the cheese cloth set aside ready for me to use. You can cut it into pieces quite big and it only takes a minute to put on.
Then I mixed up a batch of extra fast setting gypsum I bought it especially for this stage. It is the same strength of h-cal and the set time is 5 min, with a working time of 2-3 min. I tried this the other day, I put a plastic spoon on my drill and used it to mix that batch and in a deep bowl, it worked better than I thought. I brush that on also, and with this stuff I know what to expect time wise.
With the sloshing part I just take a wide paint brush and paint on the gypsum into the mold, as it starts to harden you just keep on brushing it on and you can rinse your brush then take some cheese cloth or fiber glass weave. And so on…putting on layers. Depending on what you are using determines how thick you want the cast, the silky rock I am using only needs to be ¼ - ½†depending on the area of the cast, and it is as hard as a rock. Apparently the forton mg only needs to be thin as well.
I hope that helps, hopefully I explained it good enough to understand, and of course everyone comes up with their own way of doing this so whatever makes you most comfortable.
Diane
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