The tri cobms were 85% amber. Literally war cut down hung for
2-3 days to dryn then choped up and ran. Have had 3-5 ppl say its the best HONEY oil they've had. Other 2 said closed there throt just had 3rd person say no good
85% amber will produce a dark amber extract and will be partially decarboxylated out of the gate. Young clear trichomes make a lighter colored extract.
Butane can absorb up to 32ml/L water, and the water can bring along water solubles, chlorophyll mycelles, and pigments. Freezing the material and using chilled butane reduces that issue and makes a lighter extract.
The 25 micron nominal filters pass fines. We filtered our extractions for the High Times bragging rights photos down to 0.2 micron, to insure they were bell clear in natural sunlight.
20F is too much temperature swing to stay in control. How are you controling the heat and what vacuum levels are you using?
For shatter, I use 115F Max. For wax, I either start at -29.5" Hg vac and 85F and ramp up the heat, or at 150F and ramp up the vacuum.