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Styrene mould, release agent
Styrene mould, release agent
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Andy Ricketts
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Andy Ricketts
posted 5 Years Ago
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Greetings! Newbie here...
I bought the beginners laminating kit which included the PVA release agent. The mould tool was made from Polystyrene with a wooden support, painted with (car) cellulose paint (thoroughly cured). I did wot it said for the release agent, but it didn't release. Sob, sniff. The paint came away in chunks. Wot a mess.....
Any ideas of what I did wrong? Be kind.....
Should I be using the wax release agent? If so, why is there PVA release agent in the kit?
I'm about to start reworking the tool for another go and would prefer to get it right this time!!
For scale, the finished parts are about 150mm amd 100mm long.
TIA
Andy Ricketts
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Styrene mould, release agent
Andy Ricketts
-
5 Years Ago
It sounds like the paint has outgassed through an uneven layer of PVA. PVA is normally ok as it provides a barrier. However if the PVA isn't quite even then that could cause issues. Also sometimes if...
Warren (Staff)
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5 Years Ago
.....But if the mould IS painted with a fully cured cellulose paint, what release agent should be used? The recommendation in the videos is to only use one layer of a PVA release agent, additional...
Andy Ricketts
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5 Years Ago
If PVA doesn't work nothing will. I would recommend making some small scale tests and check compatibility. I would have guessed that PVA should work as long as you have a an even layer as suggested.....
SleepingAwake
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5 Years Ago
If you can spray the PVA, then you can build up layers and you can release off virtually anything. If you don't have equipment to spray, have a look at Preval sprayers. They will work very well for.....
Hanaldo
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5 Years Ago
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