Winterizing/ De-Waxing Bho (My Method)

Here it is.  I know a few blades out there have been wondering how I do this.  I also don't think there are many good places to get this info.  Yes Skunk Pharm etc has winterizing but not really a how to.  I also believe a lot of people bash winterized for taste but they cook the hell out of it when purged.  Not necessary.  this is not the end all to winterizing just my method.
 
Some tools needed;  Good bud, glass. or SS tubes, beaker, filter system (Buchner, or just coffee filters), parchment/pyrex, vac chamber, and vac pump though not necessary. Butane, and Everclear, or food grade ethanol.  No Iso please.  Iso is the last choice for winterizing.
 
Good Bud: heat element on dehydrator is disabled.  Just circulates air.
Tubes:
1.  Blast as usual, thermos soak, closed loop, etc.
2.  After blast add in ratio of 1 part ethanol to 2 parts butane.   So if you have 300mL solution after blast add 150mL ethanol.  Pour slow as there is a reaction between butane and ethanol   Obviously do this all outside.  the reaction between butane and ethanol will purge all the butane out.  you know the butane is gone when you stir the solution and no more bubbles occur.
3.  Now to the freezer.  Be sure all butane is gone.  If not you may blow up you freezer.  Leave in freezer covered for 24-48 hrs.  For this run I did a dry ice chill.  This is not necessary, but will help precipitate out more waxes and fats.  For dry ice I do a cooler inside another cooler and leave it outside over night.
4.  Filter.  After 24-48 hrs you will notice the solution has become cloudy.  That is all the nasty stuff we are trying to get rid of. .  To get rid of this you can just pour it through a coffee filter.  however we will use a Buchner funnel with a vacuum assist to speed things up   To avoid pulling too hard and sucking waxes through the filter I use my chamber as the vac pump.  I set it up pump-hose-chamber-hose-Buchner.  Pull chamber to partial vac then close valve.  Now open valve to Buchner and use chamber as pump.  This will keep nasties out of your pump, and keep from pulling too hard.  Though it is not necessary with ethanol.  If you were single solvent de-waxing you would want to set up Buchner like this.
So for those of you who think this is a waste of time here is what was pulled from only half the solution and this stuff was filtered twice.
5.  Evaporation:  Now it is time to evap ethanol.  here is where I think people go wrong.  Most think you need to cook it off over a water bath at 170 degrees.  that is where all flavor is lost.  here is what I do.  make a dish out of parchment, or just use pyrex.  However the pyrex becomes a bitch.  Will cover that later.  here is how I fold parchment   Pour your solution in and place in a well ventilated, cool, dark, dust free area to evap with a light breeze blowing over the solution for 24-36 hrs.  here is a box I made with a 4" inline fan creating a passive air flow.  I put a seed mat in the bottom to raise solution temp to 80 deg.  this box can be directly vented outside.
6.  Purge:  After 24-36 hrs. you will be left with a viscous oleoresin of cannabis oil and remaining ethanol.  Unfortunately this is the only pic I forgot.  I will see if I can find an old one.  Anyhow from here you will need a vac, and chamber or will need to do a low, and slow heat purge.  The oleoresin will develop a thin film on top that will not allow the remaining ethanol to escape.  So just vac as normal, or do a slow heat purge at like 100-110.
7.  Enjoy.  This oil is usually so stable it takes 24-48 hrs in the chamber at 100 degrees.  Remember the evap on pyrex vs. parchment.  I use parchment because after vac chamber it is near impossible to get the oil off the pyrex.  I needed to heat it to 120 so I could scrape it off.  leaving me some crystals of solitude. .  I believe the little bit of heat affected taste a bit.  here is what came off the parchment .  This stuff is so stable you can hold it between your fingers without it getting soft indefinitely.  I hope you enjoy.  Questions comments just ask.  However this is not a thread to debate winterized vs. non winterized.  We all have our preference.  This is a thread to share ones love for winterized products, and to share others methods.  Whether they be single solvent in a closed loop, or thermos soak method.  This is meant for the at home hash maker.

 

This is true.  I just added it so people doing single solvent could see how the set up goes.

 

You can use just 1 coffee filter
Yeah the white stuff on the filter is the "wax" pulled out.  Leaving the now polished solution in the beaker below.
Evap at air temp then I vac @ 100-110 depending on viscosity for 24-48 hrs. again depending on viscosity and heat.  This is all strain dependant I find.  Some strains come out so hard they take longer to fully purge. 

 

Sorry I forgot the last 2 questions.  Without the vac assist it takes like 30 min. to over an hour.  Always filter in the freezer so no waxes re melt..
Temp of pyrex or butane, and material is really up to you.  Won't affect the final product.

 

Temp when you blast as far as I have seen makes no difference.  Jimmy hit the nail on the head though if it gets too cold while in freezer it can start to solidify, or thc can actually start to precipitate out.  Not much yield is lost.  depends on strain though.  And really return % doesn't matter as you are only getting rid of stuff that does nothing for you.  So per gram it should be more potent, and can be sold for more $ per gram.   But FYI after winterizing the return on this run was 20.5% which is huge with winterizing.  I did double blast the material on this run which I recommend when winterizing.  You are going to pull the extra crap out from second blast anyhow.  Otherwise I usually get between 14-18% when winterizing.  Of course again all strain dependent.

 

Double blast is exactly that.  Blast, grind, blast again. 
Ethanol can be hard to get, same with everclear for that matter depending on where you are.  I got ethanol from amazon for like $50 a pint.  Can't get it in all states though.  Maybe try that.  I have no idea about methyl hydrate.  But basically any high proof grain alcohol works.