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Resin question?

May 19 2017 at 11:08 PM
Ben Strong  (Login strongpoppa)
Missing-Lynx members
from IP address

Hello all and sorry for the seemingly dumb question. So would it work if I molded and then cast soft plastic figures to make them resin? I wouldn't be selling them, just using them. Is this possible? I have never used resin before so this is a shot in the dark.

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Christopher Benjamin
(Login 8179)
Missing-Lynx members

Sure, why not?

May 20 2017, 11:16 AM 

Just going to have a compressor and paint pot to force the resin into the mold.
You can then convert parts (arms, legs, etc.) easier that way. Or convert them first, then make a a cast copy of them so they stand up to handeling better.

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Rob Pye
(Login docpye2)
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Do tell me more...

May 21 2017, 5:15 PM 

Chris, can you share more specifics on this, as one of the things that has put me off doing resin is air bubbles, and since I only want to do some bits, a vacuum chamber wouldn't be cost effective. So how does your approach work, as I didn't know that you could get your airbrush compressor to suck air instead of just blow.

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Dave Haine
(Login braillescaledave)
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Re: Do tell me more...

May 23 2017, 4:12 AM 

Being a woodworker, I've got a veneer press (Bagpress) that uses my compressor to power it. The principle is similar to how a spray gun works- If you pass a high speed flow of air over a nozzle, it creates a reduction of pressure within the nozzle, sucking any air out- connect the nozzle to a sealed container and you achieve a partial vacuum within the container. Fit a non-return valve, and the vacuum stays.

My bagpress uses a giant vinyl bag as the sealed container, but I imagine that if you use a much smaller container you can achieve the effect with much smaller devices. I'm sure you can get non-return valves for airline hose, too.

One of those cheap Humbrol sprayguns would work- fit a hose instead of the plastic straw into a jam jar, make sure all joints are air-tight and use a clamp on the hose into the jar as the non return valve....

That should give you enough partial vacuum to pull out all the air bubbles.

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Tim James
(Login timjames)
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Resin casting with pressure ....

May 24 2017, 8:31 AM 

Rob, I use pressure to reduce the bubbles in my resin casts. I use a 2Ltr paint pressure pot with the outlet to the spray gun blocked off, connected to my compressor. I set it at 40PSI and have more than 90% success with no bubbles.
Pretty simple to do and works a treat, I could never get vacuum to work, it just frothed the resin out of the molds.
I've done some casting of figures but they can be a little difficult without making two part molds.

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Robert (PL)
(Login BetinhoPL)
Missing-Lynx members

Yes, but ..

May 20 2017, 1:07 PM 

It is possible - I make some resin parts for my own works. With figures it is difficult but possible

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