Kanzeon
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As far as rosin goes; I get anywhere from a 15-27% return..depending on strain and pressing factors (heat, pressure, and time). I press when the flower is about 1 week in jars, but never wet when drying.
I use a 12 ton press with 4x7" plates these days.
Hope this helps.
That's awesome and I'm jealous.
But here's the thing that I've come to realize in dabbing exclusively rosin and iso extracts side by side a lot over the past month: The biggest drawback to rosin is banger maintenance. If it's pressed at too high of a temp or for too long, one or two dabs will leave a banger super dirty from the carbonized plant materials. However the terps are outstanding and rosin can be further refined quite easily, and hash rosin is āso it's got some definite advantages too.
Iso, when washed quickly and cold, is essentially full-melt. The terps that are extracted differ, but it means that money that would go towards a press now can go to more urgent things.