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In the case of dry or older plant material, you can expect to see significantly less yield no
matter how much pressure/temperature/time you apply. Before using drier material you
should always take steps to increase the moisture content of the plant material to above
50% (or even higher) to allow the rosins to form.
Storing the plant material in a humidor or cigar box with a moisture pad and moisture
gauge is recommended.
The optimal pressure/temperature/time settings will vary, depending on the type of prod-
uct being pressed, however, typical ranges you might experience are:
170 – 230 degrees Fahrenheit
400 – 800 pounds downward pressure
1 minute to 20 minutes press time.
You will need to test and adjust to get maximum yield for each plant variety.
A colder pressing (170 to 190 degrees Fahrenheit for 90 to 300 seconds) will generally
produce a higher quality rosin but with less yield.
A hotter pressing (190 degrees to 230 degrees for 60 to 180 seconds) will produce more
yield, but quality is more likely to be impacted.
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