measuring with a syringe

[glassmanoak]

Very nice use of Similar Triangles.

Very nice indeed!! But so difficult for tiny measurements.
buy a good 1 ml syringe.. or 3 and cover them in clear tape.

 

[zoiDman]

Very nice indeed!! But so difficult for tiny measurements.
buy a good 1 ml syringe.. or 3 and cover them in clear tape.

That... or just adjust the Recipe to get away from those God Awful small Increments.

 

[glassmanoak]

That... or just adjust the Recipe to get away from those God Awful small Increments.

I agree, but if you want to make many small samples, get a decent syringe and maybe a half ml syringe too.

 

[Vappa]

Using clear nail polish instead of clear tape, it's more durable.
Not my own idea (read it somewhere else on ECF), but thought it makes a nice addition to this thread. I did all of mine yesterday and it works great.

 

[zoiDman]

I agree, but if you want to make many small samples, get a decent syringe and maybe a half ml syringe too.

I guess I think about DIY Differently than Most People.

When I consider what the Cost is to make 20 or 30ml versus the Time and Effort to Measure things on the +/- .1 level doing Small Amounts, I just make 20 or 30ml batches and Round things off to Simpler Units.

If I don’t like it and feel I Can’t fix it, I just toss it and move on.

But like I said, Everyone does things Differently.

 

[StereoDreamer]

I understand that it's fun and satsfying to come up with all sorts of crafty, inventive solutions to issues like this, and as someone who works with his hands (I do hand bookbinding for a living), I think that the advise given in this thread is FANTATIC.

However, wouldn't is just be easier for "James416" to just order some finely-marked syringes online from a US supplier? Are syringes so tightly regulated in Canada that he couldn't legally have them sent to him from a US or conadian medical supplies vendor that sells them? Does Canadian Customs really look at every package THAT closely that they would be concerned with syringes that had 0.01ml markings on them?

I'll admit that I'm not too familiar with Canadian law regarding syringes, but it seems that a lot of guesswork could be avoided if "James 416" just ordered some precisely-marked syringes. They are cheap, and easy to find...

According to BD, one of the biggest manufacturers of Luer-Lock syringes, 1/100ml marked syringes are available in US, Canada, Australia, New Zealand, so I can't understand what the big deal is...

1 mL BD Luer-Lok™ disposable syringe. Has 1/100 mL graduation.

Why not just order some new syringes, "James416"?

 

[Rader2146]

FWIW, I measured ~90*F PG out to 58 drops/mL from a pipette. 1/58 = 0.0172 mL/drop.

+/- 1 drop in a 5ml batch size = .06% error. Much, much, less for larger batches. Accurate enough for me.

I usually make batches of 120mL and don't use a syringe smaller than 5ml with .2mL graduations ( 0.003% error).

 

[Rader2146]

Also in the FWIW category, using 100mg Nicotine cut down to 18mg in a 5mL batch: +/- 1 drop = 0.35mg/mL, or ~2%, error.

Now common sense should tell you that a 5ml batch with 100mg base is not the best choice to minimize error, but I can live with 17.65-18.35mg juice.

 

[zoiDman]

...

Now common sense should tell you that a 5ml batch with 100mg base is not the best choice to minimize error, but I can live with 17.65-18.35mg juice.

I can live with it too.

And making Pre-Mix which is 10~15% Higher in Nicotine allows me to make to just add Flavoring by Drops and there Isn't much to Wash.