www.TK560.com

jegner · Last edited by jegner on Tue Jul 04, 2006 9:15 pm; edited 1 time in total

A new resin, and some new challenges.

I've started playing around with the www.Smooth-On.com 's Smooth-Cast 325 ColorMatch resin. Same great watery consistency resin, but with this stuff, you can dye it any color you can imagine. I've been making some test casts of some old AK47 pistol grips, and have to say, this stuff it tough!

Rumor has it, the FBI uses this stuff to make training guns.

Also, you can use this stuff as a shell coating, then fill the remainder with some 15X expaning foam resin, to make a poorman's 'hyper-firm' resin parts for larger pieces. I'm still experimenting with that.

Stomper · Posted: Tue Jul 04, 2006 7:01 pm Post subject:

EXCELLENT!!! I'm wanting to make a "hyper-firm" version of my E-11's and I'm wanting to make a mold of my Mk-2 variant so I can cast that sucker in that Smooth-Cast 325!

What are your thoughts on the "oomoo" silicone stuff? It's measured by volume and cost about $138 for a gallon of A & B stuff.
_________________
Tony Krewson
FEAR... is not my god!!

jegner · Posted: Tue Jul 04, 2006 9:17 pm Post subject:

Tony, don't waste your funds on that oomoo. It never really sets! All sorts of bad reviews, on the different prop boards.

Most of the Smooth-on stuff is great, but that stuff, has a bad rap.

Stomper · Posted: Tue Jul 04, 2006 11:54 pm Post subject:

So do you suggest the stuff you currently use and mentioned on the other sections of your boards? (I forget the name and place ATM)
_________________
Tony Krewson
FEAR... is not my god!!

AlterEgos · Posted: Wed Jul 05, 2006 1:16 am Post subject:

jegner · Posted: Wed Jul 05, 2006 7:50 am Post subject:

It's good to get some feedback on the Oomoo. I got the trial size, and was hoping to convert from the expensive Polytec Plasil 71-20 that I have been using. I was not happy with the resulting blob.

Tony, if AlterEgos is having good results with it, then it must not be all that bad. Wink

Me personal experience, is, well, I liked the 71-20 better.

Jim

AlterEgos · Posted: Wed Jul 05, 2006 12:47 pm Post subject:

Well, I'm always looking for ways to make my life easier and 1 to 1 mixing for bubble free silicone is a god-send! Wink

Perhaps what most people don't like about the Ooomoo products is the texture. It has sort of a weird soft/velvety feel to it after it cures, but I've never had the stuff fail to cure on me. Maybe I'm just lucky?

At any rate, I think Smooth-On has some of the best products for the best prices on the market and I'll faithfully endorse every product I've ever used by them.
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-John

Plasticman · Expert Joined: 08 Jul 2006 Posts: 109

Does anybody know what the 'hyper-firm' resin is?

Stomper · Posted: Mon Jul 10, 2006 6:34 pm Post subject:

Well one of the Sci-Fire guys claims that its not an "off-the-shelf" material, and thats ALL they'll say about it.

When I was in the Army we used rubber M-16's for bayonette training, because it would have beat the real ones to pieces to treat them like that everyday, all day.

I suspect that one can indeed get that same material, its just a matter of finding the right supplier! Very Happy

_________________
Tony Krewson
FEAR... is not my god!!

Plasticman · Expert Joined: 08 Jul 2006 Posts: 109

Thats what I was thinking.....I have a buddy who has one of those M-16A1's...... I think its the same stuff.

jegner · Posted: Mon Jul 10, 2006 7:39 pm Post subject:

Tony is right, the material we know and love called 'hyper-firm' is, in my opinion, a combination of Smooth-on SmoothCast 325 and a 15x Expanding foam resin. The SmoothCast 325 is first poured into the mold, and sloshed around. Once this sets if forms a shell coat. The cavity is then filled with the 15x expanding foam resin. The result is a very lightweight, rigid but flexible casting. More work than a straight cast, and on small or thin parts the 15x expanding foam resin is not needed.

I have heard the FBI uses the SmoothCast 325 for making dummy training guns.

There might be another product used and the street name is Hyperfirm, but I don't know for sure. The Lewis Gun I studied from Tony was, in my opinion, made by the above mentioned process.

Stomper · Posted: Mon Jul 31, 2006 12:06 am Post subject:

OK, I just bought the gallon sized Smooth-Cast 325 and a bottle of "So-Strong Black Tint"... a smidge over $100 with shipping!! Shocked

I just spent MOST of the weekend cleaning up my shop as it literally looked like a "pig-bomb" blew up in there, I mean when you have to tip-toe around and OVER crap just to go from one work bench to the other, I mean REALLY... Laughing

but anyway I'm fixing to make the backer boxes from 1/8" black styrene, and take the clay I have and make a two part mold for my M38A2 scope I just accuired on Ebay. I'm so excited to try something new... one step towards making a "hyper-firm" version of my E-11's!!! I'm contemplating fabricating a roto-cast machine as well, WOOT!!
_________________
Tony Krewson
FEAR... is not my god!!