Tactical Command
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Don't use the resin dregs
http://www.tacticalwargames.net/taccmd/viewtopic.php?f=7&t=9591		 Page 1 of 2
Author:  Otterman [ Mon Jun 04, 2007 7:48 pm ]
Post subject:  Don't use the resin dregs
Chroma's posting and an experience from this weekend has prompted me to give this warning to all who do their own resin casting.

Pipboy, Moscovian, Chroma, be on note:

The bottom 50cc or so of my Smooth-Cast resin seemed extra 'sticky' and/or corrosive. I lost two molds due to stickage.

Thus, it is best just to waste the final dollar or two of resin in order to keep your molds safe.
Author:  Moscovian [ Mon Jun 04, 2007 7:54 pm ]
Post subject:  Don't use the resin dregs
Hmmm, I haven't reached the bottom of my bottle yet so I can't confirm.  What I may do is try 'wasting' a mold that I have no need for anymore to see if it is a batch problem (it would be good to know).  

Thanks for the warning though! I'll report back here when I 'get to the bottom' of things. :p
Author:  The_Real_Chris [ Tue Jun 05, 2007 6:41 am ]
Post subject:  Don't use the resin dregs
Stir and shake?
Author:  vanvlak [ Tue Jun 05, 2007 7:12 am ]
Post subject:  Don't use the resin dregs
I've never used resin for modelling, but have messed around with Polyester resin for mounting lab specimens this week - this stuff benefits from being stored in a refrigerator. Would that help here?
Author:  Otterman [ Tue Jun 05, 2007 2:45 pm ]
Post subject:  Don't use the resin dregs

(The_Real_Chris @ Jun. 05 2007,00:41)
QUOTE
Stir and shake?

Yes, I think I could have benefitted from more vigorous shaking. Not when I was down in the dregs, but earlier when the bottle was less depleted.
Author:  The_Real_Chris [ Tue Jun 05, 2007 2:57 pm ]
Post subject:  Don't use the resin dregs

(Otterman @ Jun. 05 2007,19:45)
QUOTE
Yes, I think I could have benefitted from more vigorous shaking. Not when I was down in the dregs, but earlier when the bottle was less depleted.

Are we still talking about resin?
Author:  Pipboy [ Tue Jun 05, 2007 3:26 pm ]
Post subject:  Don't use the resin dregs
I've always given the bottles a good shake every time I go to pour some molds and I've not had a problem yet. Having said that though, I have had a few pours where the reaction has gone all crazy. I don't know if there was a bad mix ratio or what, but I've had the resin take *forever* to harden - and when it did it was mostly clear!?! Wierd. I just waited all day for it to harden and pulled it out. In the end it was fine but I still don't know why it did that. And that wasn't even at the bottom of a bottle.
Author:  Markconz [ Tue Jun 05, 2007 4:01 pm ]
Post subject:  Don't use the resin dregs
Damn it all sounds so complicated and mysterious! :(
Author:  Chroma [ Tue Jun 05, 2007 4:23 pm ]
Post subject:  Don't use the resin dregs

(Otterman @ Jun. 05 2007,14:45)
QUOTE
Yes, I think I could have benefitted from more vigorous shaking. Not when I was down in the dregs, but earlier when the bottle was less depleted.

Yeah, I've been shaking the original shipping bottles and then transfering that into "control" bottles for mixing... I shake those too.

The only "weirdness" I've had is some small portions of a cast that just won't cure; it stays sticky/gummy forever.  I assume I didn't stir well enough.
Author:  Otterman [ Tue Jun 05, 2007 4:36 pm ]
Post subject:  Don't use the resin dregs

(The_Real_Chris @ Jun. 05 2007,08:57)
QUOTE
Are we still talking about resin?

We can talk about any sort of stuff that you want, my man.
Author:  Otterman [ Tue Jun 05, 2007 4:37 pm ]
Post subject:  Don't use the resin dregs

(Markconz @ Jun. 05 2007,10:01)
QUOTE
Damn it all sounds so complicated and mysterious! :(

You have to be prepared for a steady stream of disappointments until the learning kicks in.
Author:  Moscovian [ Mon Jul 09, 2007 4:51 pm ]
Post subject:  Don't use the resin dregs
Well, I was able to confirm this the hard way.  There is a a sticky problem with the Smooth-On resin for sure, although this wasn't at the bottom.  I've clearly got 1/3 of my resin left and the stickiness flat out ruined my DE Raider mold :angry:  :angry:  :angry: .  I'm going to call Smooth-On to see if they have any suggestions but for now I just wanted to warn everybody that this is not just in Otterman's head (or his measuring cups, more accurately).
Author:  Otterman [ Mon Jul 09, 2007 6:07 pm ]
Post subject:  Don't use the resin dregs
Weirdly enough, I'm nearing the 25% point in my current bottles of resin.

Heya Moscovian, what kind of resin are you using? I noticed the sticky using the Smooth-Cast 310 product, but my current bottle is 305. Guess we'll see if it exhibits the same behavior soon.
Author:  Pipboy [ Mon Jul 09, 2007 10:30 pm ]
Post subject:  Don't use the resin dregs
Moscovian, don't chuck that mold yet. Give is a day or two to cure and try to demold the piece. It may not cure fully, but i might cure enough to get it out. I've had that happen before.
Author:  Moscovian [ Mon Jul 09, 2007 10:36 pm ]
Post subject:  Don't use the resin dregs
Thx pipboy - I was getting ready to fling it across the room in frustration.  The DE Raider has been a taxing project (not fun which is not good for a hobby) so this was just a horrible sight to come home to.
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