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There is no arguing that any trapped air will froth up in a liquid when vacuumed, but with my usage recently for poly, the froth disappears when the vacuum is removed and everything becomes effectively under pressure. Now add a pressure pot and that'll really crush any bubbles.
Of course I'd imagine that 95% of that effect could be obtained without any vacuum stage (and bonus, no froth).
Of course I'd imagine that 95% of that effect could be obtained without any vacuum stage (and bonus, no froth).
