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Re: Factor40's Public Display

PostPosted: Mon Mar 03, 2014 11:10 am
by mangozac
Steve (and Ben) these look absolutely stunning! I expect they will have received a good response from all of those Catachan guard players?

Re: Factor40's Public Display

PostPosted: Mon Mar 03, 2014 11:28 am
by factor40
So far, yes sir!

Re: Factor40's Public Display

PostPosted: Wed Mar 05, 2014 8:27 pm
by Fleafa
I guess this is kinda a Resin Addict Co-Labs project :)
It's been great fun working with Steve on these.

Re: Factor40's Public Display

PostPosted: Fri Jun 27, 2014 2:24 am
by factor40
To anyone in the US who is interested, I have a used Mastercool 3cfm, single stage vacuum pump for sale. Send me a PM or an email if you're interested.

steve at madrobotminiatures dot com

Re: Factor40's Public Display

PostPosted: Sun Jun 21, 2015 5:47 am
by factor40
Long time no post, apologies for that. I just was experimenting with some new silicone and I thought I would share what I've found so far. Normally I use Smooth On Oomoo25. It's easy to mix, doesn't require degassing and it's easy to cut and work with. This new silicone, called Mold Star 20T, has double the tear strength compared to Oomoo so I thought I'd give it a try. The "T" in 20T means it's semi-transparent.

Anyways, it mixes on a 1:1 ratio and cures cloudy...
Image

Looking at it through the light however, does reveal a certain amount of transparency...
Image

Even the slight bit of transparency did seem to help when I was cutting the molds. The material is quite spongy after it cures, no doubt a result of it having such a high tear strength. Where that may become an advantage is in removing casts from the molds on a regular basis...
Image

As you can see, the material allows for a LOT off flexibility, without any concern of tearing. Working with small parts, that means I can open these up with a little less fear that they will rip out. Only time will tell how quickly this material will dry out. I normally get a 2-4 month life to a normal mold before it starts to show some real degradation.

I'll post pics of the casts in a bit to see if they come out any different.


[1 hour later...]

I think we have a success!
Image


Right, that settles it for me. Hope this helps you in your continuing quest for casting nirvana :)

Re: Factor40's Public Display

PostPosted: Sun Jun 21, 2015 10:23 pm
by Islacrusez
Looks like some nice casts indeed! How does this stuff stack up in the price scale?

Re: Factor40's Public Display

PostPosted: Sun Jun 21, 2015 11:04 pm
by factor40
Islacrusez wrote:Looks like some nice casts indeed! How does this stuff stack up in the price scale?

A one gallon kit of Oomoo is about $150, this Mold Star is about $180.

I would note that overnight, the mold formed up a little more.

Re: Factor40's Public Display

PostPosted: Mon Jun 22, 2015 7:44 am
by mangozac
Time will tell - make sure you keep track of how many pulls you get. When I'm serious about doing a comparison I'll make two identical moulds at the same time (one from each silicone product) and always cast them simultaneously.