Glad I could help, Ella.
Markimar, yes, you will dilute the flavor by adding unflavored e-liquid to a doubler.
I am finding this all so very confusing. Mind you, it really doesn't take much to confuse me! I'm wanting to order some doublers, but have no idea what to do.
Doublers are the same flavor as the e-liquids so you can add it to the e-liquid without diluting the flavor but you would dilute the nicotine strength.
The reason you would want to do this is that doublers cost 1/4 as much as the e-liquid (1 oz for $15 vs 4 oz for $15.) You can therefore order stronger e-liquid than you want to vape plus a doubler and stretch your dollar. For example, if you want to vape 4 ounces of a flavor at 12mg you can order:
-- 4 bottles of 12mg e-liquid for $60; or
-- 1 48mg bottle and 1 doubler for $30, mix it yourself and you'll still have an ounce of doubler left.
When the FOTW is the flavor you want, you won't save as much but you will still save a lot.
There are great spreadsheets around that will calculate how much of this, that and the other to add but I think they're best for DIYers who are adding a variety of things and need to know how much of everything to put into the mix. When you are only putting two things together, you can just do averages.
I had all the basic dilutions you can do with the nic levels TV carries on a spreadsheet to make it easy for me to mix. I posted it
here. The reason I refer to "parts" is that it doesn't matter what size units you use. 10 drops of an e-liquid plus 10 drops of the doubler will get you the same strength as 1 ounce of each.
Because all you are doing is averages, you can figure out the % VG in a mix the same way as Ella did.