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Draw from vial one. Do NOT pull the plunger any farther. Air will make this process harder. Stick it into vial two and draw slowly. The lack of air will keep things tight and uniform. I draw with a 22-23g so most of the time when I remove the needle it lets a little air back in to keep the vacuum from getting too high. You can also vent every few shots to keep it manageable.
This is very easy and you can be extremely accurate by not letting ANY air into the needle/syringe between compounds. I do this a lot, never let me down.
Thank you very much. I will try this method out.Draw from vial one. Do NOT pull the plunger any farther. Air will make this process harder. Stick it into vial two and draw slowly. The lack of air will keep things tight and uniform. I draw with a 22-23g so most of the time when I remove the needle it lets a little air back in to keep the vacuum from getting too high. You can also vent every few shots to keep it manageable.
This is very easy and you can be extremely accurate by not letting ANY air into the needle/syringe between compounds. I do this a lot, never let me down.
I thought about putting air into each vial before drawing any of the compounds to vent the vials and make the drawing process easier. But I will try the method @Fattyone suggested.Nice. You can put some air into the first vial only and in next pin start drawing from the other vial. I agree, if you start messing with air while having the syringe loaded it can go south ez.
I'm going to drop this here since it seems it would be particularly relevant. If anyone doesn't like it they can eff off, I don't give a crap. DM me and I can tell you where to get them if you're interested. The spikes are cheap but shipping from Europe to the US is $35, to Europe quite a bit less.
Use needle free vented spikes that allow you to easily draw with high precision without any possibility of back suction. Your needle will stay sharp since it's not
installed in the syringe until you're done.
The venting feature allows air, in this case filtered air, to flow into the vial as you draw.
A few other cool things, filters particles in the liquid to 5um, ie bits of vial stopper and some bacteria, has a valve that seals the vial as soon as you disconnect the syringe, and the air valve is two way pressure equalization so at least with the first draw, you can leave it connected while pushing bubbles out of the syringe, conserving any of the gear you'd usually squirt out in the process.
View attachment 285786View attachment 285787
There aren't many videos of this type of spike in action, but if you look closely you can see bubbles in the vial as she's drawing.
I have some on the way and will post a dedicated thread after I test them.
View: https://youtu.be/RGYLR3v09cU