It's in this section of the library :
The Wonderful World of vaping - (Part 3 of 6) Software and Process
And here is what it says:
Even if you are not allergic to PG, you might prefer VG or those others. Conventional wisdom is that PG packs more flavor and throat hit, but VG generates more vapor. [When I mix my own juice, I use both.]
I know and that is the strange part. Have you ever vaped straight PG with nothing else in it? There is no TH so the TH can't be coming from the PG it must be that whatever is giving the TH gets mellowed out more by VG than PG. I have vaped pure VG same thing to TH but lots more vapor for sure. I also have 48mg 50/50 unflavored that has zero TH. I know that some people add alcohol for the TH but not everyone. I would really like to know what it is they are adding to get TH besides Alcohol. Or is it like I said before and some companies nic is less pure or clean or something? Strange. PG by itself doesn't give much vapor at all in fact if you hold it in for any time at all you exhale nothing visible. I got into the DIY a few months back and tried every combo I could think of. Adding a few drops of everclear does add all the TH I need, but I don't think that is what most of the companies use.