Making your own e-juice
Here's my easy peasy method:
Ingredients :
High purity marijuana extract (I have only tested BHO and CO2, anything with solid particulates will NOT work)
Propylene Glycol/Vegetable glycerin (USP grade) (Amazon)
(Optionally a flavoring product, available from many e-liquid sites.)
Method :
I never weigh my ingredients because my batches are for personal consumption, but the guy I learned this from sells the e-pens and ready made hash-juice so he likes to be more exact. I will give you ballpark figures to give you an idea.
Take 5 grams hash and place it in a small glass container, one where you can keep all of the hash together when it starts melting.
Pour a small amount (.5-1 mL [3-10 drops]) of PG/VG in with your hash.
Heat gently and stir. I mean gentle! I use a lighter, but only because I've done it a bunch of times. I would recommend a hot water bath. If you see vapors coming off the mixture, cool it down! You're cooking off the good stuff! As you stir it up it'll all come together into a homogeneous mixture. I add PG as I go, my goal is to use as little of the stuff as possible, as I like my product stronger than most. Your goal is to make it viscous enough to pour, as your ecig can't process it otherwise. You can add the optional flavoring at this stage, following recommendations of the manufacturer.
Wham, bam, thank you ma'am!
Just a sample link to the style I use (510/eGo/CE-4 all the same thing): http://www.ecigexpress.com/vision-crystal-mini-ego-starter-kit.html
Another style of vape: http://www.steammonkey.com/SPIDERMONKEY_p/kit-spid.htm http://www.steammonkey.com/Chimp_Kit_Kanger_VV_Mini_Protank_2_Dripper_p/kit-chimp.htm
The glass bottles I keep my shit in: http://www.amazon.com/Amber-Glass-Bottle-Dropper-15ml/dp/B0085W96U0/
The ratios are approximate, it's impossible to give you an actual amount because hash can be different. Wax takes a bit more PG than shatter, for instance. Personally I want to be smoking straight hash, make your juice as strong as works for you. I have some people who smoke it at 1/5 strength.
Read up on the difference between PG and VG, but the short version is
PG gives a thicker hit, is less viscous and gives off much less of a cloud when you exhale.
VG is slightly sweet, smoother, and gives off big clouds of vapor when you exhale.
I use my e-cig in public all the time, in bars and restaurants, grocery stores, the movies... there is no smell to it! I use PG because there's barely any visible evidence when you exhale, those VG clouds will have people looking at you suspiciously. cough cough