|From:||"Renton, Lousie, Mrs" <firstname.lastname@example.org>|
this is a question for all the resin users.
I have started using polypropylene pill vials (the sort with a snap-on
lid) as moulds for my resin blocks (MMA). I have subsequently
found 2 things happening:
1. If the lid is snappped on securely I get the "champagne effect"
with millions of bubbles frozen for all eternity in the resin.(unusable
blocks - start again)
2. If the lid is left with a little gap or a pin hole or 2 - the resin
polymerises fantastically without bubbles, but a layer of gooey stuff
remains at the air/resin interface - up to 0.5cm thick
Is this normal?
How do I get the gooey stuff to set? - heat it? cool it? wait for
Do I just scrape it off and pretend it didn't happen?
BTW - the moulds are left in an incubator overnight at 24 degC
leaving them o/n at RT results in VERY slow polymerization
All comments welcome
Bone research unit
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