I'm not quite sure what the problem is. I've checked the math and I'm still baffled..... This happens quite often, but I finally decided to ask why.
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Why is it that I can mix two separate bottles of identical size, but the actual volume of liquid is different between different recipes?
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I mix by weight using eJuice Me Up calculator
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For example, I just mixed two 15 mls of the following:
HHG RY4 6% - 0.9g
FA White Peach 1.5% - 0.22g
FLV Cream 1% - 0.15g
Nic 6% - 0.9g
PG 2.33g
VG 10.5g
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-And-
CAP Sugar Cookie 3% - 0.45g
CAP VC1 2% - 0.3g
FA Vienna Cream 1% - 0.15g
Nic 6% - 0.93g
PG 2.8g
VG 13.23g
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The Sugar Cookie recipe fills the bottle to the top and the RY4 recipe only reaches the bottom of the neck of the bottle. I made both twice just to make sure I was precise with the amount of concentrates, nic, vg, and pg. What gives?
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Edit: I just noticed my "grams set" were different for the two mixes, but shouldn't they both still result in 15mls? I'm assuming most recipes are based on 1 gram for all categories in the "grams set" tab?
As other posters have commented, mixing by weight will give you different volumes because different fluids (flavors, PG, VG, nicotine sol'n) will have different densities. Something that's 1.5 g/mL will also be 0.66... mL/g.
Another thing nobody mentioned is that when you mix different solutions together, the interaction between the solutes can actually change the volume. A made up example would be if your vanilla flavor had a density of 1.05 g/mL, and your strawberry had 1.15 g/mL, mixing them together 1:1 won't necessarily give you a solution with a density of 1.10 g/mL. You could even get a higher or lower density then either solution! I think this latter point would explain things if you have a handle on how density works.
Chemistry is weird.
> Chemistry is weird.
Can confirm. My favorite analogy is taking a litre of water and a litre of gravel, and combining them in a two litre bottle. You’re not gonna fill the bottle all the way, because the water fits in all the little gaps of the water. VG and PG do the same thing, only on a molecular scale and to a lesser extent.
The VG looks low on the RY4 one - make sure VG is set for a weight of 1.26g/mL
Your right.... I just took the time to load all my flavors in ATF and I'll start using it as a calculator. Tired of EJuiceMe Up resetting the weights at random.
Do you mix by weight or volume? Do you use a calculator? What were the amounts of the vg/pg/nic you calculated?
Responded in main body. Thanks.
If you mix by weight (and you should) your volume results will vary. Not every flavor has the the same specific gravity even though we assume they do for simplicity's sake.
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Also first recipe is 14.55gr total, second recipe is 17.86gr.
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Also I doubt your hand and your scale are accurate enough to mix .23gr of anything.
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Aaaaalso the space between the bottom and the top of the neck in a 15ml bottle is like .5ml in volume.
And where it gets annoying - specific gravity and density are different though related. I have seen data straight from vendors that lists specific gravity as having a unit (i.e. g/L) when the whole point of specific gravity is that is it unitless.
i just use https://e-liquid-recipes.com the precise weight of everything is accounted for