navycop
Member
I know it has something to do with putting the mold in the toaster oven. But is that before adding the resin? Then do you put the filled mold back in the oven? If so, at what temp and time is this process done?
What does "post curing" mean?
- Thread starter navycop
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PR_Princess
Member
After your resin has set up and hardened, the surface will normally be a bit tacky. (Most of the resins that we use are formulated this way so that you can pour layers.)
Eventually the surface tackiness will go away on it's own, but by exposing the surface to low heat (toaster over, hot box, sun what have you), the tackiness will go away much faster.
But if you do this you will miss out on the joy of having sticky fingers that will leave a gooey resin residue on everything that you even remotely think about touching. But then sometimes I think that is half the fun of casting!!:tongue::biggrin:
One word of warning though Mike...do NOT get the resin too hot, nor get it in close contact with the toaster oven element or open flame. It could start on fire.... DAMHIKT!:redface:
Eventually the surface tackiness will go away on it's own, but by exposing the surface to low heat (toaster over, hot box, sun what have you), the tackiness will go away much faster.
But if you do this you will miss out on the joy of having sticky fingers that will leave a gooey resin residue on everything that you even remotely think about touching. But then sometimes I think that is half the fun of casting!!:tongue::biggrin:
One word of warning though Mike...do NOT get the resin too hot, nor get it in close contact with the toaster oven element or open flame. It could start on fire.... DAMHIKT!:redface:
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CaptG
Member
Post curing to me is when I take the blanks out of the pressure pot, they are sticky on the surface so I put them in a toaster oven at 150 for 1 hour. This "cures" any soft resin. Then I let them come to room temp. before I trim and use the pen mill. The sticky is gone and my blanks seem to turn very nice. This is using silmar 41.
Curly
Member
I thought it was when you send someone a blank you just made and the resin fully cures in the mail. :tongue:
Pete
Pete
JohnU
Member
If you don't have a toaster oven you can place them outside in the sun on a nice warm day and that will do the trick also.
ldb2000
Member
After much playing with different temperatures , I think that post curing also makes PR blanks a little more brittle . The higher the temperature the more brittle they become . The best temperature I have found is about 125 degrees . at that temp the blanks fully cure in about an hour without adding to the brittleness of the resin .
EDIT:
I use a temperature controled hot box , and I use it for heating the resin and molds to 125 degrees and for post curing at the same temp .
EDIT:
I use a temperature controled hot box , and I use it for heating the resin and molds to 125 degrees and for post curing at the same temp .
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