I have NEVER had this happen before. Casting labels and playing cards with Silmar 41 Polyester Resin. Opened up a brand new can. Casting in vertical tubes with 5 drops of catalyst per ounce. Put in pressure pot with 44 psi and let it sit for 24 hours. Totally shocked as all of the tubes were surrounded by tiny bubbles and all completely ruined. Ughhhh!!!! Any ideas why this happened today and NEVER in the past???? Could it be a bad can of resin? Would appreciate any help. Thanks.
HELP! Bubbles!!!
- Thread starter saffron
- Start date
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Mortalis
Member
Without pictures it is tough to identify any issue. I am not a caster but only thing I could say would be you needed higher pressure (like 60psi). That is only a guess from what I have read and observed from online information. Were the tubes open to the pressure? Obviously, if the tubes were capped on both ends the pressure would not be able to condense the bubbles.
Curly
Member
My wife's setup when she cast feather blanks used only 10 or 15 psi. She degassed all the resin in an ultrasound cleaner that also warmed it a little. Then she very gently mixed in the MEKP. They were horizontal moulds but I don't see how that would make a difference. Your bubbles might be because it was a new can and had been agitated a bunch before you got it.