Its actually really easy. On the DIY Juice subforum there is a downloadable spreadsheet you can use. Though I found that really too busy and too much crammed into a small space. Still good to have for reference and info. Instead I use a free program called ejuice me up by a guy that goes by breaktru. download it here
eJuice Me Up - Best eJuice Calculator he also has his own forum but here is a link that is kind of the training manual
eJuice Calculator - HOW TO
one place I made my mistake is that I thought since I use 18mg, that's what I have to buy. But you can see in the calc, in the first line you put the nic strength you bought and then the second line is to what strength you want to dilute to. The other mistake I made is that I bought 100% vg nic juice so that presented a problem with only having 18mg nic juice as I couldn't dilute it with regular pg to get to a 60/40 ratio as then that would dilute my nic. So I had to purchase some 100% pg nic juice.
If I knew then what I know now this is exactly what I would get
1. nic
a. buy it 50/50 from myfreedomsokes.com as they have a good price OR
b. buy 1 bottle 100%vg and 1 bottle 100%pg from wizardlabs.us and mix the two together to get 50/50
c. for the nic level you have two things to consider
1. if you are fine with vaping 50/50 then you can purchase your nic at the same level you vape (ie 18 mg) or you have to measure out your two different nic carriers at different levels to achieve the ratios you want
2. if you want the ability to change your pg and vg up and down then go up in the concentration of nic juice (ie 48, 60 or 100 mg) so you can dilute your nic juice down with desired levels of vg and or pg (the software does it all for you so don't worry)
2. pg and vg
a. again you can get from wizardlabs, myfreedomsmokes or even on amazon
Amazon.com: Glycerin Vegetable Kosher USP - 1 Quart: Health & Personal Care and
Amazon.com: Propylene Glycol - Food Grade USP - 1 Quart (32 Oz.): Health & Personal Care or from the first amazon link you can go to that places website and purchase their pg too, not sure why it isn't on amazon
http://www.essentialdepot.com/servlet/the-Propylene-Glycol/Categories
b. FDA says this stuff ahs a two year shelf life when kept in a dark cool place. Keep that in mind when you decide what sizes to buy (same goes with the nic juice)
3. flavors
a. I have found the flavors apprentice and loranns to be the most popular, but there are others that make flavors as well. but as luck would have it wizardlabs.us also carries both in 8ml GLASS bottles (the glass is a huge bonus for storing and preserving) and only at $1.50 each
b. I would recommend getting a few bottles of ethyl maltos as well. Its basically a sweetener but its a sweetener in a sense that it acts like a buffer on flavors or flavor combos that have a sharp edge. another way to put it is that it rounds out the flavor rather than actually sweetening it. I suggest doing a little research on this wonder flavor/add
4. equipment
a. you don't need a lab to do this, get some gloves
Nitrile Gloves - X-Large - Quantity Discounts
b. get some empty bottles in your desired sizes ( recommend 3 and 10 ml)
10ml LDPE Dropper Bottle with Child Resist Cap or many places have bottles with diff colored caps or a few with needle caps which can be nice depending on your hardware
c. getting a few glass bottles for long term storage is not a bad idea
Results for Boston Round:Cobalt Blue Bottles or
http://www.amazon.com/Boston-Round-...eywords=4oz+boston+glass+bottles&tag=e04ed-20
d. measuring is easy with syringes, I recommend getting a few of everything on this page (I didn't get the 20ml syringe) and that "might" come to $10
Syringes, Needles, and Pipettes getting the various sized syringes is key as the 1 ml syringe has the measurements when you have to do finite .1 increment measurements
e. I got labels for my bottles by going to vista prints and getting return address labels, 280 for $10 after shipping. I did custom ones so I made lines for flavor, pg/vg, nic, and date. Overnight prints has the same and depending on which one has sales is the one I would go with, or can just get these from amazon
Amazon.com: Avery Rectangular Labels, 1 x 3 Inch, White, Removable, Pack of 72 (06728): Office Products
I looked at a lot of DIY kits and found I could get more of exactly what I wanted/needed and cheaper by getting my own stuff and I also found most places charged a HUGE MARKUP on the "kits". Some of this above may seem like a wizardlabs.us sales pitch, but they mix the nic to order and have a very good one stop shop to get almost every single thing you need at the very best prices (currently). Im sure someone will come along to undercut them pretty soon. This is all purely on my own research that I have compiled over the last two weeks. This may not be the best way, and others may know a few tips tricks and shortcuts, but this will get you your own DIY juice bar open for personal business IMHO with everything you need. (though some may state you need to get a nic test kit as well).