Sorry to interfere,
but I can not be indifferent when it comes to extraction with ethanol.
In my opinion for the protection from contamination by chlorophyll flowers do not need to be dry.
Conversely, the more water there is in the tissues of the plant,
the less chance there is of ethanol to dissolve the unwanted components.
Solvent does not get to the places that are already filled with water.
This works even at room temperature, and works more reliably when the water is frozen.
Five minutes of gentle shaking acceptable at room temperature.
For strongly cold ethanol time can be increased considerably.
Pleased to know that you share my preference for white versus transparent.
The resin can be seen better on the white glass than on transparent.
I am very convenient to use specially bought for this purpose -
Luminarc Carine White Dinner Plate - 21cm - Tempered glass.
When successfully picked temperature resin acquires a viscosity that it can be collected
in one continuous spiral movement so that it forms one solid ingot on the blade.
I grip the blade with three fingers (click) - thumb, index and middle.
I learned that in the early years. Thus corrected errors in the drawings in ink on Whatman paper.
but I can not be indifferent when it comes to extraction with ethanol.
the QWET extraction I did some time ago.
The procedure is the following:
I took 13 gr. of frosty dried flowers and put in a pyrex bowl in the oven at 50/75°C (120-170°F) till the flowers were crunchy enough.
This step should help losing chlorophyll without damaging the resin.
In my opinion for the protection from contamination by chlorophyll flowers do not need to be dry.
Conversely, the more water there is in the tissues of the plant,
the less chance there is of ethanol to dissolve the unwanted components.
Solvent does not get to the places that are already filled with water.
This works even at room temperature, and works more reliably when the water is frozen.
5 minutes gently shaking the bowl and a following filtration
Five minutes of gentle shaking acceptable at room temperature.
For strongly cold ethanol time can be increased considerably.
This time I used a ceramic white plate instead of glass and it was way easier to collect the resin as the incremented contrast of the white was very helpful.
Pleased to know that you share my preference for white versus transparent.
The resin can be seen better on the white glass than on transparent.
I am very convenient to use specially bought for this purpose -
Luminarc Carine White Dinner Plate - 21cm - Tempered glass.
However scratching the oil was an hard work and I need to keep the plate warm to make it easier. It was like 30 minutes or more to collect everything.
When successfully picked temperature resin acquires a viscosity that it can be collected
in one continuous spiral movement so that it forms one solid ingot on the blade.
I grip the blade with three fingers (click) - thumb, index and middle.
I learned that in the early years. Thus corrected errors in the drawings in ink on Whatman paper.