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Old 07-17-2017, 01:08 PM   #1 (permalink)
 
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Default Slowing the cure time for PR?

I have a nice rack set up for my pressure pot. I could double the number of blanks per batch with another layer, but don't want to run out of time to get them all in the pot before they start to cure.

Is there a way to slow the resin's cure time without causing other problems?
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Old 07-17-2017, 01:31 PM   #2 (permalink)
 
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Originally Posted by thewishman View Post
I have a nice rack set up for my pressure pot. I could double the number of blanks per batch with another layer, but don't want to run out of time to get them all in the pot before they start to cure.

Is there a way to slow the resin's cure time without causing other problems?
How many drops are you using Chris? Right now with Silmar 41 and with a temperature of 93 outside, it takes about 16 minutes to gel for me. And that's using 4 drops per ounce
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Old 07-17-2017, 02:23 PM   #3 (permalink)
 
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Originally Posted by thewishman View Post
I have a nice rack set up for my pressure pot. I could double the number of blanks per batch with another layer, but don't want to run out of time to get them all in the pot before they start to cure.

Is there a way to slow the resin's cure time without causing other problems?
How many blanks would you be able to do at one time that you think they would start curing ?
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Old 07-17-2017, 04:05 PM   #4 (permalink)
 
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If you are using pre-promoted polyester, you can reduce the amount of catalyst.
One issue with that method is, if you are coloring the resin, the colors will be more likely to blend.
Another method is to keep the resin around 65 degrees. An issue doing this is, the resin has a thicker viscosity, and can trap air. With using pressure, it might reduce the chances of trapped air though. One procedure to help eliminate the air is to use vibration, before pressurizing.
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Old 07-17-2017, 06:37 PM   #5 (permalink)
 
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Currently I'm doing 45 at a time, clear, tube-on. I use 3.5 drops per ounce. A second rack would double my capacity, but probably take too long to pour accurately.
Was just hoping that I could find an easy fix that wouldn't have negative consequences.
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Old 07-18-2017, 12:21 PM   #6 (permalink)
 
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Currently I'm doing 45 at a time, clear, tube-on. I use 3.5 drops per ounce. A second rack would double my capacity, but probably take too long to pour accurately.
Was just hoping that I could find an easy fix that wouldn't have negative consequences.
Sounds like we need another pressure pot!!
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