Vacuum held while pump off still purging?

[gaiusmarius]

would sure be an interesting experiment. becas the tongue and lung coating effect of bho is something that made me never really get into it. i suppose the absolute would be the way to go if i want to get back into it. although i love the ice water extraction method so much for so many reasons that i doubt i'll be messing about with absolutes unless there is a medical reason to do so in the future.

 

[midwestHIGHS]

I believe its being extracted from both leaf and trichome shell, my most wax filled oils to date have been from low quality material with little resin head conent. Also any time I run material a second time it usually has more waxes that are removed than the first extraction. The reason why vaporizing flowers or mechanically extracted concentrates doesn't make your lungs a feel this way is because the waxes are in their natural state, once dissolved by a solvent, mixed with the resins and purged of that solvent, they are no longer in there natural state and our lungs seem to handle them differently.

Fullmelts and absolutes for the win!

 

[Lebniis]

Great discussion. I'm noticing even my absolute is harsh on the lungs. Maybe I need it to be thinner in the vacuum.

Also, for absolutes, how much of the butane needs to be purged before dissolving in ethanol?

 

[gaiusmarius]

the fact that outdoor seems to make more waxes then indoor would make me think a lot of those waxes are coming from the leaf matter, it's commonly known that out door bud has a higher leaf content then indoor.

good point about the waxes being in their natural state when you smoke/vaporize bud or hash.

 

[foaf]

how would a cold solvent change a wax from its "natural state".

And regarding the use of historical safety to alleviate the concern that vaping bho waxes might have some health possibilities... I realize that historically people smoked cannabis, so I understand you idea of not a perfect comparison, but when you smoke something, the material that is in the path of the hot airflow vaporizes and mixes with the smoke from burning, Im pretty sure that most of the thc and probably the waxes vaporize before the burning region reaches that part of the joint or bowl, so vaporizing is really much older than we think, it's just that it was historically also mixed with smoke from burning material too.

 

[foaf]

and back to the original post

as long as there is a vacuum, it doesnt matter if the pump is on or off, but as butane comes out and your chamber may leak some, the vacuum diminishes.

I use a nalgene vacuum check valve and set my pump to go on for a few minutes, then off for like 20 minutes, and let it run overnight. you need a check valve to do this or the pump oil will flow into the tubing and sometimes into the chamber. regular water pressure type check valves wont work well because they have a high "cracking pressure" differential.

 

[Lebniis]

The pros really showed up for this one, thanks guys.

Foaf, would you recommended that same valve? Could you shoot me a link to buy one, I am not finding it besides a 6 pack on amazon.

 

[Olifant]

When purging solvent I've always felt that it is best to leave the pump running and work at as high of a vacuum as possible to keep the atmosphere as degassed as possible to prevent degradation while the extract is being warmed. That said, assuming a perfect seal on y our vacuum chamber and that you've achieved your peak vacuum, there's no more O2 in the chamber after you shut the pump off. Speaking of which has anyone looked into the rate of decarboxylation versus degradation to CBN under vacuum and/or inert gas atmosphere versus decarboxylation in an open vessel?

As was stated by midwesthighs, the waxes are cuticular and epicuticular waxes mostly from both the gland cuticles and adaxial and abaxial leaf surfaces depending on the material being extracted and how it was extracted. A quick wash on highly resinous high potency manicured frozen flowers is obviously going to be a lot of gland cuticle waxes compared to leaf and calyx expicuticular waxes. I'm guessing a lot of the higher purity pale colored crumble waxes have gland cuticular waxes as their chief impurity. Epicuticular and gland cuticular waxes are an intresting group of compounds which have a significant part to do with variance in mold susceptibility of different strains, sesquiterpenoids, hydrocarbons, flavonoids, alcohols with ketones (ex, fatty acids), and without, esters of both. It seems the cuticular waxes on the glands are dependent more upon the plant remaining alive and healthy since as soon as the plant starts to senesce the waxes and the gland contents they protect darken as we've all seen. The extracts I've made from trim with minimal bud tend to be much darker (esp after removal of the least polar waxes) even at comparable purities leading me to believe the more alcohol soluble leaf epicuticular waxes darken more readily although in general the glands on the subtending leaves mature before the flowers making an even comparison difficult.

http://gcat.davidson.edu/mediawiki-1.15.0/images/d/d8/Samuels_color.pdf

 

[Gray Wolf]

Good post and link bro!