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Collecting => Customs => Customizing Tips and Tricks => Topic started by: Smartypants1635 on March 31, 2006, 10:47 PM

Title: silicone molds i got a success
Post by: Smartypants1635 on March 31, 2006, 10:47 PM
hey any one have experience wit these. I used vaseline to make it a two part but the second have did not  capture the detail like the first is there a possibility I used to much vaseline or is it that I did not get the correct amounts of each rubber part
Title: Re: silicone molds
Post by: Jedi_Master_Ben on March 31, 2006, 11:55 PM
Smartypants,

It does sonund like you used to much vaseline. I nomally use a mold release that is in a powder form. Almost like babypowder, but with out the shine. The other sollution is to get a mold release agent that is in the form of an airasol can. Its vaseline in a spray can. All you want to do is give it a quick coat, no more than one to two passes of the mold so you have it covered. No dripping, or pooling of this stuff or you loose detail. I hope this helps.

Jedi_Master_Ben
Title: Re: silicone molds
Post by: Smartypants1635 on April 1, 2006, 09:24 AM
thanks Ben I just read Glass's tutorial and he uses a q- tip, I just used my finger (probably why it didn't work) :-X also do I want to cover my piece I'm casting or no.

I was trying to mold a teemto and a Ody and neither of them turned out good, the first half rocked........ second half was a dud like a stated. If I can get some decent molds today out of them I'll go ahead and mold my Sculpted head :P Then on to the casting. :P
Title: Re: silicone molds
Post by: Jedi_Master_Ben on April 1, 2006, 10:17 AM
Smartypants,

I use a fine paint brush and vaceline before I bought the mold release that is in a powder form. What you want to do is give a VERY LIGHT COAT, thats it. No clumps, no drips, no pools, no excess at all. It should look like the figure or part has just a slite gloss look to it. Besides, the vaceline is more to keep the silicon from sticking to itself than to the figure or part. Silicon sticks only to itself. By coating the figure/part you ensure that silicon will not get stuck in small crevious. Don't forget to put in your air vents and keys  into your mold. Trust me, it will pay off.

Good  Luck,

Jedi_Master_Ben
Title: Re: silicone molds
Post by: Smartypants1635 on April 1, 2006, 10:29 AM
I have the keys part down but the way I've seen it done there is no need for vents. thanks for the help Ben I hope to be casting today
Title: Re: silicone molds
Post by: Smartypants1635 on April 1, 2006, 05:27 PM
AAAAAAAAAHHHHHHHHHHHHH ok so I just went to the garage to take the casts out of there molds and when I opened them up the molds weren't filled with the cast just little flakes of resin and they didn't even fill the whole thing up????? can you tell me what went wrong?
Title: Re: silicone molds
Post by: Ryan on April 1, 2006, 05:35 PM
Just out of curiosity how come you seem to start a new casting thread every week or so?
Title: Re: silicone molds
Post by: Smartypants1635 on April 1, 2006, 05:38 PM
I don't  ??? this is the same one I was using the other day. I havn't started one for a few months check it out for yourself. >:(
It was in december when I was asking if I could use plasti dip then someone else asked the same question in january or febuary, go back to page six and you'll find mine but I havn't started Any thread of any sort since december. >:( why don't you stop accusing and check your facts first. >:(
Title: Re: silicone molds
Post by: Smartypants1635 on April 1, 2006, 06:40 PM
K so i went and checked my next cast like you said Ben and it turns out that with my 2 peice mold its leeking through the crack between each peice of the mold and also there is a miniscule hole in the indent from the lego tray i used as the base when making the mold so >:(. Looks like im gonna need to perfect my technique. was it this hard when you first made yours?
Title: Re: silicone molds
Post by: Jedi_Master_Ben on April 1, 2006, 11:00 PM
Smartypants,

I could sit here and tell you the stories of the disasters and successes in casting all night. But I won't.  ;D I will tell you this, with each experiment casting and molding is another block in the learning process in this hobby. Keep a log of all your attempts and note all the successes and failures. This is chemistry we are dealing with. Just because the instructions say to mix this with that does not account for climate and humidity and any other elements that could affect the mold and casting process. I am still learning and asking questions everyday. I keep trying new stuff as soon as I hear about it. Once you find what works for you, practice that until you find something better. Hang in there, you're doing fine.  Also, see if your school's art teacher could help you out with some supervision until you feel comfortable doing it at home. And, as always, you can ask us for help anytime.

Good luck,

Jedi_Master_Ben
Title: Re: silicone molds
Post by: Smartypants1635 on April 2, 2006, 11:11 AM
Thanks Ben, I am definately gonna keep at it but those first ones were just bad.
And I'm definatley not going to my art teacher shes a psycho seriously, shes a very odd woman.
Title: Re: silicone molds
Post by: babyjawa on April 2, 2006, 11:16 AM
I am making a tutorial for my friends at thejawa. When it is finished I could post it here.
Title: Re: silicone molds
Post by: Smartypants1635 on April 2, 2006, 11:19 AM
yeah dude that would be great, I think my mold crisis is over just now to make sure the resin stays inside the mold, do rubber bands work to hold them together?
Title: Re: silicone molds
Post by: babyjawa on April 2, 2006, 11:23 AM
Did you cut it in half? I usually just hold mine together because it takes only 2mins for the resin to harden.
Title: Re: silicone molds
Post by: Smartypants1635 on April 2, 2006, 02:39 PM
I followed glass mans tutorial on Iron cow, but my resin takes 30 mins to cure 15 min pot life. its the only kind the shop had :-\  smooth cast 305 by smooth on
Title: Re: silicone molds
Post by: DSJ™ on April 2, 2006, 03:24 PM
Hey guys, I curious to know what rubber molding compound & resin you use.

Back in the day when I needed to make casts of parts for model kits, I use RTV Molding Compound (http://www.modelbuilderssupply.com/products/cast.htm) which gives out one hell of a detail on the item & Alumilite Casting Resin  (http://www.hobbymasters.com/index.asp?PageAction=VIEWPROD&ProdID=1967) which sets in 3 minutes & can get pretty bloody hot.

(http://www.modelbuilderssupply.com/IMAGES/image004.jpg)  (http://www.hobbymasters.com/ProductImages/tools/resin.jpg)

Sadly the hobby store that I got these from is no longer around.  :'(
Title: Re: silicone molds
Post by: Smartypants1635 on April 2, 2006, 03:33 PM
well I havn't had success but I use oomoo25 by smooth on for my mold and smooth cast 305 for my resin :-\
Title: Re: silicone molds
Post by: babyjawa on April 2, 2006, 03:34 PM
I use Alumilite Resin and Alumilite Quickset RTV silicone.
Title: Re: silicone molds
Post by: DSJ™ on April 2, 2006, 03:41 PM
I use Alumilite Resin and Alumilite Quickset RTV silicone.

The hobby store never had the Alumilite Quickset RTV silicone which was strange. Good choices on the compounds, quick & easy.  :)
Title: Re: silicone molds
Post by: Smartypants1635 on April 2, 2006, 04:55 PM
where is glassman when you need him
Ok so I go to open my newest cast and there it was nice and perfect on the side that was facing up. then i pull it out and the other one totally trapped with air. but the weird thing was is is it wasn't caused by my careless ness it looked like gas was created as a result of the chem reaction ( before i put both halves together i noticed that it was bubbling) and then formed air bubles inside :'( did i not get half and half of the chemicals or what would cause this.
Title: Re: silicone molds i got a success
Post by: Smartypants1635 on April 2, 2006, 06:46 PM
HURRAH I got a success with my Anoo dat prime sculpt, which is the most unlikely I would have ever thought.

I was having troubles with the silicone molds so I said what the heck and used my latex mold I made a few days ago, and it worked.
I have molds of that with all of my others I wanted to so im am happy. ;D :D :D 8)
Title: Re: silicone molds i got a success
Post by: Glassman6 on April 3, 2006, 12:05 PM
Smarty, sorr for being absent... comcast issues at home.
If using the method  i suggested, pour your two halves,
and wait for the resin to start to thicken.
If its a 30 minute cure, it should start to thickend in after 5 minutes.
Then press the two halves together.  So it doenst run out.