Vacuum Oven

[Waxmasta Flex]

 

[Waxmasta Flex]

Those are really nice, a bunch of cool features. I find the biggest problem with vac ovens is size, I wish I could fit a 11x15" pyrex in the one I use. If I could bring my pans inside and straight to the vac oven it would save a lot of time and effort.

TRANSFER TO SOMETHING ELSE

 

[Waxmasta Flex]

VAC OVEN FTW...VOLUME NIGGA VOLUME

 

[coastal]

I got a used "Precision Scientific Napco 5831 Lab Vacuum Oven #2" for 850 bucks off ebay.

I purge for 48+ hours at 30hg~ 105-110F and the shatter is of the best consistency that I have been able to achieve.

Not to mention you simply place your dish in the vac oven, pull your vacuum and sit back n relax. With the vac oven I am able to do much larger batches, specifically thicker slabs that are smooth and "bubbleless".

Amazing value. I recommend ebay for finding your vac oven. Simply search for one in an area near you and offer to pick it up and pay cash.

Never looking back.

Any loss in terps at all purging for that long? Just curious. My finger is hovering over the order button for one of these things.

 

[OGShush]

I got a used "Precision Scientific Napco 5831 Lab Vacuum Oven #2" for 850 bucks off ebay.

I purge for 48+ hours at 30hg~ 105-110F and the shatter is of the best consistency that I have been able to achieve.

Not to mention you simply place your dish in the vac oven, pull your vacuum and sit back n relax. With the vac oven I am able to do much larger batches, specifically thicker slabs that are smooth and "bubbleless".

Amazing value. I recommend ebay for finding your vac oven. Simply search for one in an area near you and offer to pick it up and pay cash.

Never looking back.

Damn, that sounds like a wet dream come true, I've got to secure the funds and get one of these bad boys. It's so difficult to hit that G-spot of temperature with something as approximate as a toaster oven.

It seems like all evidence points towards shatter as being the purest most stable "texture" of BHO. Any insight as to what might be causing this waxing in underpurged products? My current hypothesis is residual moisture causing the solution to emulsify somehow but I'm sorely lacking a how and why.

I've been trying to come up with some sort of experiment to test this, but all I can see is trying to work backwards by contaminating a small amount of stable product with water seeing if it turned to wax. Maybe even something as simple as oil in boiling water and pipetting it back out and observing what happens?

It'll be a while before I get to try and test this, I'm weeks away from a harvest and of the oil I do have only a small amount of it is shatter grade and obviously at this point it's worth 10x it's weight in unicorn pubes. Any chance you've got some input or observations to throw at me in the meantime?

 

[OGShush]

Any loss in terps at all purging for that long? Just curious. My finger is hovering over the order button for one of these things.

I wouldn't think so, like I said in a previous posts oxidation slows greatly when something is subjected to a vacuum. A vacuum lowers the boiling point of a liquid, but my hunch is that the physical state of terpenes as they appear in resin prevents their boiling point from being lowered. I want to say they're an amorphous solid, but that would be complete speculation on my part. The combination of these properties allows a vacuum to selectively remove water and butane while retaining most of the volatile organic compounds. The overwhelming smell of flowers when you open your vac chamber is that rush of oxygen causing the oil to resume it's normal rate of room temperature oxidation.


Anytime you smell weed what you're smelling are these volatile terpines naturally oxidizing. Fucking science, eh?

 

[TreeBug]

Many of my friends bought from http://acrossinternational.com/Vacuum-Drying-Ovens_c18.htm

 

[hammalamma]

You will definitely loose terps purging for that long.

 

[Gray Wolf]

We picked up a used Napco 5851 on Ebay for $550, but find that it doesn't control well in the 85F/115F temperature range, so we are refurbishing it with new digital controls.

Because both heating elements are on the bottom of the oven box, the inertia and hysteresis are huge, so I first tried installing a Type K thermocouple into the center of the oven, to try and control it that way.

Alas, the control band was still too large for even our Panasonic self teaching controller, so I've ordered two Type K ring type thermocouples and a second controller.

I plan to bolt the thermocouples to the top and bottom plates of the oven and move one of the 500W strip heaters from the bottom of the oven to the top as well. I will leave the thermocouple in the center of the oven as a simple readout for information only. The second controller will control the top oven element and the first the bottom.

This should allow me to control the temperature of the bottom and tops of the oven at different rates, and to tell what the average radiant temperature in the enclosure is.

I installed a 40A Crydom solid state relay, which I pulled out of my junk drawer, to interface between the heating elements and the controller, and it is way over kill for the 8.3A load, but the price was right.

More when the parts arrive and we have them installed.

 

[montroller]

I installed a 40A Crydom solid state relay, which I pulled out of my junk drawer

LOL GW's junk drawer, I imagine, is something like Mary Poppins bag. He can just reach in and pull out the necessary equipment!

Good luck on the self repair!

 

[generalgrievous]

Ordered a brand new across international ..the 1.9 cubic ft. model. Waiting daily for it to land ..on my way to work now ..maybe she'll be waiting for me

 

[analogcricket]

its been 24 hrs in vac oven and my 15gram patty is still bubbling... im confused...

 

[Gray Wolf]

What temperature? Decarboxylation also causes bubbles.

 

[analogcricket]

What temperature? Decarboxylation also causes bubbles.

ive been setting pv to 125... but i know its not getting up that high

 

[Gray Wolf]

At 115F you still have some bubbling from decarboxylation and at 125F, you would have more.

 

[analogcricket]

At 115F you still have some bubbling from decarboxylation and at 125F, you would have more.

whats the easiest way to tell when to stop? id rather not over do it. ive heard in the past that you dont want to overpurge. How do i tell when that point is? 24hr at 115 at 700 torr too long?

 

[nakadashi]

When you guys are cooking for these 24+ hr durations at 115+ does the product change color over the purge?

 

[ricksiri]

Received my 1.9 cu ft Across International vac oven and am having a hard time figuring out the settings. Anyone care to give me a quick run-down on the controls? The manual sucks...lol...imo. Feel free to PM me if you want.
Thanks mucho

 

[Gray Wolf]

whats the easiest way to tell when to stop? id rather not over do it. ive heard in the past that you dont want to overpurge. How do i tell when that point is? 24hr at 115 at 700 torr too long?

The solvent bubbles are random sized and larger than the small more or less fizzy CO2 bubbles from decarboxylation.

We stop as soon as solvent bubbles cease.

 

[Gray Wolf]

When you guys are cooking for these 24+ hr durations at 115+ does the product change color over the purge?

I've never had to purge over about 45 minutes, so don't know about 24 hours.

Getting oil to wax sometimes takes overnight, and yes it does darken it to cook it that long.