Repeating a formula/trial with accuracy?

Mar 30, 2022
I have my own answer/solution to this question already, but I was wondering if maybe anyone else had ideas/input.

Currently I'm working only neat/100% with the exception of solid or difficult materials or some extremely high impact materials diluted to 20 and 2%

In order to not waste materials, most of my trials are finishing in around 5ml including ethanol at 20% concentration.

If I want to remake a trial and change something, it seems the only way to be very accurate is to scale way up, or dilute every material. Because I'm finding, let's say I have multiple materials around .01, .02, .03 ect grams, the drops fluctuate. One time a drop may be .013 and the same material another drop comes in at .017,

So if I have
.033g of a material, to repeat that working neat seems to be only by chance.
So like I said, It seems to me the only way to be accurate with the % of that material is to dilute, or scale way up?

Just wondering if anyone else that works 100% has other methods for replicating a trial without having to have everything prediluted or wasting lots of materials?

Thank you in advance.


Basenotes Plus
Basenotes Plus
Jun 2, 2005
I'm with Paul on this - work to 10g initially and only dilute things you need to add in traces. I work pure mostly but things like skatole I have at 1%, 0.1%, 0.01%, 0.001% so I can use it in various ways. When I'm ready to make 1k or more of juice, I do a technical formula which removes dilutions so I'm left with easily usable amounts like 0.06 skatole pure for example. The difference is made up in a final dose of diluent.
Mar 30, 2022
Thank you Paul, thank you J,

Is 10g target for raw materials? Or do you aim for 10g finished with ethanol?

Seems like if you were aiming for 10g (I read your thread on 10g trial batches, using 15ml bottles), if that's 10g including ethanol, your concentration would be around 2grams. Which still to me seems like it would be difficult to repeat. If say you have materials in that formula at .055g , this is still hard to land on with drops ranging from .008-.022, fluctuating per drop.
So I'm assuming your 10g is your total concentration? Most likely making your smallest raw material doses typically no lower than .100? Which I can see actually being able to land pretty close to.

Are there particular pipettes that are more accurate than others? I'm primarily using .2 ml disposable and 1ml for larger dosing.


Basenotes Plus
Basenotes Plus
Dec 5, 2007
The Target is 10g of pure concentrate. As I mentioned, I work nearly completely with undiluted/pure raw materials.
One drop's amount in grams has an amount of fluctuation, certainly, but since one drop is roughly equal to 0.10 to 0.20% of a 10g formula, most raw materials added to a formula sample size of 10g do not need predilution.
Last edited:


Basenotes Junkie
Oct 26, 2021
I would like to try to work with undiluted, and often I don't like to use dilutions, but as I am beginner, i can't spend trillions of euros for months eheh

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