Ml and grams the same?

[Riplea]

I am using ejuice me up for mixing recipes. It doesn't show grams but ML. So if it says .3 ml of custard, I add .3 gram of custard via my scales. Is this correct?

The reason I ask is that when I mix a 30 ml recipe, it is consistently short, recipe to recipe of 30 ml in the bottle. Or it appears that way because I have about 1/4 to 1/2 inch of space left in the bottles. Does that sound right?

 

[DaveP]

I use 1mg per ml for all my flavors. As BotBoy says, all flavors are in the range of .7mg to 1.07mg, so 1 is a good rule of thumb that will be close enough. If you err on the low side you can always add flavor after the fact once it's steeped and taste tested.

About half way down the page on the site below there's a conversion guide for all the ingredients in ejuice. I copied the section below.

From the web site below:

When it comes to flavors, there are a couple of thoughts/theories surrounding mixing by weight when dealing with flavors. Many people enter the specific gravity as indicated on an MSDS for every flavor that they have. I feel this is a complete waste of time. After searching hundreds of MSDS sheets for flavors, all flavors fall into a range of .93g per ml to 1.07g per ml.

In order to achieve personal consistency for your juices though, all that is relevant is that you use the SAME value, every time for any given flavor. I simply use a value of 1.

Botboy141 Guide to Mixing By Weight • /r/DIY_eJuice

The basic values that you need to know for mixing by weight are below.

• Weight of PG: 1.038 grams per ml
• Weight of VG: 1.26 grams per ml
• Weight of Pure Nicotine: 1.01 grams per ml
  
  
• Weight of 100mg in PG: 1.035 grams per ml
  
  
• Weight of 60mg in PG: 1.03632 grams per ml
  
  
• Weight of 50mg in PG: 1.0366 grams per ml
  
  
• Weight of 48mg in PG: 1.036656 grams per ml
  
  
• Weight of 36mg in PG: 1.036992 grams per ml
  
  
• Weight of 24mg in PG: 1.037328 grams per ml
  
  
• Weight of 100mg in VG: 1.235 grams per ml
  
  
• Weight of 60mg in VG: 1.245 grams per ml
  
  
• Weight of 50mg in VG: 1.2475 grams per ml
  
  
• Weight of 48mg in VG: 1.248 grams per ml
  
  
• Weight of 36mg in VG: 1.251 grams per ml
  
  
• Weight of 24mg in VG: 1.254 grams per ml

 

[Sugar_and_Spice]

I am using ejuice me up for mixing recipes. It doesn't show grams but ML. So if it says .3 ml of custard, I add .3 gram of custard via my scales. Is this correct?

The reason I ask is that when I mix a 30 ml recipe, it is consistently short, recipe to recipe of 30 ml in the bottle. Or it appears that way because I have about 1/4 to 1/2 inch of space left in the bottles. Does that sound right?

Sounds right to me. It really depends on what you are using to measure with. Different types of measuring tools has resulted in not being equal.

I also used to think the ml to grams was a 1:1. Now I am really not so sure. Tried using a scale but none of the recipes resulted in the same overall taste as when mixing with volume.....jmho

 

[Riplea]

Since I am mixing 60 to 70 percent vg, I can see how my 1-1 gram to ml is coming up short in my bottles. So is everyone that uses scales using a hand calculator too? Or I just need a different program than ejuice me up?

 

[Izan]

EJMU V16.0

I strive for consistency. I want to be able to produce the exact same juice EVERY time I make it.

 

[zoiDman]

...

The reason I ask is that when I mix a 30 ml recipe, it is consistently short, recipe to recipe of 30 ml in the bottle. Or it appears that way because I have about 1/4 to 1/2 inch of space left in the bottles. Does that sound right?

For any Given size, there is always a Little space left in a Bottle.

Do you have a way to measure 30ml of Water? Then you could pour the Water into the Bottle and make a Mental Note of where it reaches.

BTW - 1 Ounce equals about 29.6 ml's. So you could also Measure 1oz of Water and do the Same Thing.

 

[DaveP]

EJMU V16.0
View attachment 634141

I strive for consistency. I want to be able to produce the exact same juice EVERY time I make it.

There will be some variance. Correct values for weight do make a difference. My nic is 75pg/25vg, so I calculated the weight from the percentages for each using BotBoy's numbers and the result was 1.09. That's what I use. Everything else is from BotBoy's site as he lists them.

 

[Rule62]

I have weighed all of the ingredients I use most frequently, and have the weights in my notes, because I'm kind of a nut like that, plus, I enjoy math, and figuring stuff out.
Most of my PG based flavors weigh anywhere between 1.03g and 1.06g per ml. Flavors that have VG content, like some of the OSDIY flavors, will weigh more.
But the important thing, whether mixing by weight or volume, is consistency from batch to batch. IMO, mixing by weight is more consistent.

 

[DaveP]

I have weighed all of the ingredients I use most frequently, and have the weights in my notes, because I'm kind of a nut like that, plus, I enjoy math, and figuring stuff out.
Most of my PG based flavors weigh anywhere between 1.03g and 1.06g per ml. Flavors that have VG content, like some of the OSDIY flavors, will weigh more.
But the important thing, whether mixing by weight or volume, is consistency from batch to batch. IMO, mixing by weight is more consistent.

I think consistency can be equal for weight or volume. It does matter that we are careful with our measurements. It's easy to drip a little more, especially with PG and VG out of a squeeze bottle. I rarely get exact with pouring from a bottle onto a scale, but I'm only a few hundreds of a gram off, usually it's over a bit once the scale settles.

OTOH, if you measure liquid volume into a beaker and then pour it into the mix bottle, was there a film of thick liquid left in the beaker that should have gone into the bottle? Now, we are grasping at straws! In the final analysis, the test should be whether the juice is what we expected to create.

 

[Rule62]

I think consistency can be equal for weight or volume. It does matter that we are careful with our measurements. It's easy to drip a little more, especially with PG and VG out of a squeeze bottle. I rarely get exact with pouring from a bottle onto a scale, but I'm only a few hundreds of a gram off, usually it's over a bit once the scale settles.

OTOH, if you measure liquid volume into a beaker and then pour it into the mix bottle, was there a film of thick liquid left in the beaker that should have gone into the bottle? Now, we are grasping at straws! In the final analysis, the test should be whether the juice is what we expected to create.

I think it's all relative, depending on the quantity you're making, and the strength of the flavors being used.
Just as an example, if you were making 30ml of juice, and the recipe called for 1% menthol, a drop or two would be more significant than if you were making 120ml of the same recipe.

 

[zoiDman]

...

But the important thing, whether mixing by weight or volume, is consistency from batch to batch. IMO, mixing by weight is more consistent.

Just Me.

But I find I can Achieve the same level of Precision and Repeatability whether I use Measuring by Volume or by Weight. Or Mixing by Drops for that matter.

The Difference, to me, is How Long it takes? And How Much is there to Wash/Dry when I'm done?

I think Measuring by Weight is the Fastest. And I have Less to Wash when I'm done.

 

[Riplea]

Ok, think I have it now. Thanks for all the help. I didn't realize how to set up the calculator for grams.

 

[zoiDman]

I think it's all relative, depending on the quantity you're making, and the strength of the flavors being used.
Just as an example, if you were making 30ml of juice, and the recipe called for 1% menthol, a drop or two would be more significant than if you were making 120ml of the same recipe.

This is a Good Point. And you are using a Good Term, "Relative".

Because the if you use 2 Drops of Menthol too many in both Mixes, you have the same Error for Both. 2 Drops.

But the Relative Error to the Total Volume is Different.

 

[JCinFLA]

OTOH, if you measure liquid volume into a beaker and then pour it into the mix bottle, was there a film of thick liquid left in the beaker that should have gone into the bottle? Now, we are grasping at straws!

Won't be a film left if the person mixes directly into their mix bottle. But, if they don't...it usually makes a little worm like stream that can still be easily poured into the mix bottle. It's easy-peasy!

But I get the gist of what you meant.

 

[Cool_Breeze]

Does it all depend on how far to the right of the decimal point one wants to be...

 

[man00ver]

Each flavoring should have a specific gravity. In some cases, this is specified by the manufacturer, usually in a Material Safety Data Sheet (MSDS).

FlavourArt is good for this:
Fuji = 1.019 g/mL
Custard = 1.053 g/mL
Vienna Cream = 1.038 g/mL

Capella too, sometimes:
Vanilla Custard = 1.067 g/mL (no MSDS published yet for Vanilla Custard V2)

The Perfumers/Flavor Apprentice is another one that's helpful sometimes:
Brown Sugar = 1.066 g/mL (no data for DX Brown Sugar, yet)

As far as I know, Inawera hasn't released materials data at all.

When not specified, I'd use the gravity of PG (~1.04g/ml), and accept that I might by off on volume by a hundredth of a gram per mL or so. It's a good excuse to accidentally squirt an extra drop. Oops!

If I really wanted to be persnickety about it, I'd weigh it myself in a graduated cylinder, then enter my result under My Flavor Stash on the ELR site. I haven't done that with anything yet. I mean, we're talking about hundredth-grams here.

P.S. Don't trust your eyes. Many 30mL bottles provide various amounts of headroom for shaking. Just because it's not full to the neck doesn't mean you haven't put in 30.

 

[DaveP]

The bigger the bottle the more slack you have with shaky hands. I do six 50ml bottles with flavor and a 100ml bottle of unflavored in a session. Those get me up to the start of the neck taper and they are almost always even across the row of bottles after mixing.

I'm close with my mixes, but if the mix calculator calls for 32.411 grams of PG and I drip to 32.41g slowly, but the scale settles out at 32.69 sometimes ... that's fine. So what if I'm at 71/29 on my PG/VG instead of 70/30?

I'm guilty of overrunning my nic even more. I think it's a subtle, mental thing where my brain says, "If 1.5 grams is good (3%), 1.7 is even better!"

 

[DaveP]

I've seen pictures of commercial ejuice labs where there's lots of dispensing equipment. Even with that kind of precision there has to be variation when the heat is on to get orders in the mail. Haste makes Waste as I was told while still a young Whippersnapper!

How many of us have received a juice order that was obviously made the day it was shipped? The tip off is that it's almost clear and it darkens over the next week or two. That's probably the reason they love LDPE bottles so much! They are frosty and diffuse the color.

 

[zoiDman]

Does it all depend on how far to the right of the decimal point one wants to be...

True.

But I think what is Lost sometimes is even with Average measuring equipment, one usually has the Ability to measure at Smaller Levels than one has the Ability to Taste.

So Measurement can become an Exercise in Numerics.

 

[DaveP]

True.

But I think what is Lost sometimes is even with Average measuring equipment, one usually has the Ability to measure at Smaller Levels than one has the Ability to Taste.

So Measurement can become an Exercise in Numerics.

I wonder about that when it comes to tobacco flavorings. Some of my Hangsens I've tried at low to moderately high percentage, only to find that more isn't necessarily better and I wonder if I will never find the magic mix for my taste. Finding the sweet spot takes lots of time to hit. That, and the percentages that individuals publish may be good for them and blah to others.