I'm not sure I could math that small :)
Mixing a 10ml by weight, a single drop of most flavorings is roughly .5%... cut the batch in half and your ability to "fine tune" gets pretty rough.
Not necessarily so! I feel that this is very effective and simple to do if you measure by weight. I have found that 0.02 g is about equivalent to anywhere between 1-4 drops, depending on the flavoring.
Here's a test sample of 4ml with 4 flavors in 30g/70vg, 0 nic.
Now, there might be some fine tuning for when you want to scale up a recipe to let's say, 120ml, but that's everyone's business at some point or another anyway.
This is the issue with batches this small. It's good if you have a top notch scale, but they're expensive, and it's good for single flavor tastings but there's a tiny margin of error. Good to have to give to your friends if you want them to beta a flavor though
I found these on The Perfumer's Apprentice website, I think they're what OP got
https://shop.perfumersapprentice.com/p-6834-4ml-glass-bottles-wcaps-droppers.aspx
edit: did some googling, they're available on amazon too, a 12 pack for $12.99
Edit: I didn't even realize they sold these at TFA, as I am a regular customer there.
Well at least I got bulk for cheap.
Yup. This is what I use but it is really hard to get the measurements right. I usually just do drops to get ratio to get an idea of how the flavorings mix together. If the ratios are good, I'll scale it up to 10ml and tweek from there.
i.e. 1 drop = 1%, 3 drops = 3%, 5 drops = 5%, etc. It isn't perfect but it gives me an idea of how the flavorings work together.
i don't diy now but i plan to eventually, have you thought of the 5ml plastic bottles? they seem like they would work fine and maybe be cheaper, i think its the road id take
http://www.containerandpackaging.com/item/B813?source=googlepla&gclid=CKiXsvuS0sUCFYZAaQodqCkA8Q
These would be great for sending out samples! Can we have a source? Someone posted 12 for $12.99 and that seems a little pricey considering I can snag 60ml bottles for $0.50 per.
/u/devo9090 do you plan on sharing where you got them from? ;\
I use 15 5 ml glass bottles for trying to recipes or tweaking old ones and they are great but the only issue is the plastic drip top (i think they are for herbal oils or incense). They absorb the flavors and are a pain to clean. This looks like a great solution, thanks OP.
Also want to mention i have a $20 scale that goes to .01 and have never had an issue with accuracy doing 5 ml batches by weight.