Older material darker oil? Why is this happening?


#1

Ok, before jumping to conclusions bare with me. I cropped a nice DWC crop and blasted a small test slab (aprox. 8gr). I made it using my tek for shatter (the same one I always use) using N-butane to exrtract. Then 72 hrs in vacuum oven at -29.5 in. Hg, temp between 91-93 deg F. slab surface temp. (flipping every 12 hrs). Anyway I cropped a few different strains. One being “Gorilla Glue #1”. This is the strain I did the small sample slab of. I dried the herb slowly, but thoroughly for about 12-14 days. No cure. Getting to the point, the oil came out almost clear at first, still after days of purging under vac. It was lighter color than honey, and extremely stable (like glass). I put the remaining material in glass canning jars and cured it for about six weeks, then it got packaged in freezer bags and stored in a cool, dark, dry area for another month or so before I decided I wanted to make another “Gorilla Glue #1” slab. Mind you it hasn’t been a crazy amount of time between making these two slabs. Around 3 months. So it is not like it is old degraded cannabis. I use buds also, because all I do is make concentrates. I used the identical tek. The identical starting material, and identical N-butane from the same supplier. The problem is this time around the color of my slab was several shades darker. I have seen other concentrate companies store their starting material in freezer bags, waiting to be extracted. So I thought it was ok. Oh and the first slab was some of the best tasting shatter I have smoked! The second identical slab had maybe half as much flavor. I can’t believe that short amount of time would degrade my material so much. Losing the terpenes that fast amazed me also. So what am I doing wrong? Please help me make better concentrate. Do I need to run it all as soon as it is dry? I still have like 5 lb in freezer bags. The darker shatter seems to be just as potent. Idk. Any feedback would be much appreciated! Sorry for the long header. Forgive me.


#2


The one one the left is slab 1./ “Disregard slab on right” (that is another story)/


#3

This is slab no 2. Same everything just 3 months older. Not sure why such a dramatic color change, and loss of terpenes and flavonoids


#4

Maybe ice formation on the nugs during storage? Darker color usually indicates a more ‘full spectrum’ extraction which means there may have been more polar compounds captured durring extraction - IE the ice melted and created more water in the system?
I’m not sure how well the trichomes age during curing but I do know the lighter Slabs are almost always ran with fresh material.
My 2 cents


#5

which takes me to water in the 'tane.

@KidKannabi5, do you have molsieves? have you dried them recently?

edit: what do you think happens during that 6 week “cure”?
(chemical changes. some may result in color…)


#6

They are stored at between 57-60 degrees Fahrenheit, sealed, and in complete darkness. Then repeated the exact same tek. You may be right, but I still wonder. Thank you for helping me figure this out. It may change the way I harvest and store.


#7

I still have all this to run…aprox 5-6lbs flower.


#8

what are you using for an extractor?
obviously not a 4x48 column (fits 5lb).

is that a no on the molsieves?
are you using a CLS?

edit: empty cans lying on the floor suggest no.


#9

freezer bags. no freezer. so not ice.


#10

As a CLS operator I would say that the fresher the material the better but only if you’re utilizing the right equipment, such as a molecular sieve as cyclopath instructed. Open blasting leaves too many variables that you can’t control I would suggest you look into a used cls they go for cheap if you are in a rec legal state


#11

Machine trim will always result in a dark return. Or so was the excuse 2 extractors have me.

Old material will also, due to degradation of the matierial.


#12

I’ve never heard that machine trimmers degrade biomass but I’ve also never ran machine trimmed material either :man_shrugging:t3:


#13

they open cells. which leak undesirables.


#14

Yeah, I’ve never had machine trimmed material not come out a little darker, at least. And if it’s machine trimmed AND older material it’s just going to be a mess.


#15

I work only six weeks after harvest material is cured/ Dried in Cotton tents and frozen before use (butane )
If a batch stays in open air ( cured ) for more than six weeks i get the same color variation so i stop making bho end products
Another 6 weeks so 12 after harvest i stop
Making Distillate do My clean up sop s were very basic Brine wash / hexane
Winterize -40 C thats iT
So i guess the curing conditions are to be looked at
Having Some evidence that curing with infra red light on helps Maybe someone with that sort of knowledge can explain


#16

I run a cannabis trimming service with 2x twister t4 units. On top of being a grower, extractor, consultant, etc.


#17

If you look at the pic. It is not trim.


#18

Open blasting. I feel like you have more control. Other than wasting alot of butane, you can see the process and adjust according. Imo


#19

Thank you for your response. That is the kind of info I’m looking for. I appreciate the help


#20

Gotcha, i was just backing up my machine trim = dark extracts from my exp.