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Magnetic stirring for the unfamiliar


#362

I have thought about something like that, rubbermaid makes a shelf liner that is pretty thin and non slip! Used to line the drawers in my tool chest with it. Was much more economical that the stuff they designed for it!


#363

When i first got started all i did was small batches so shakin was good. Moved into making larger batches because sometimes, time to sit and mix is very limited. I can put a 250ml batch on the mixer and let it mix while i mix the next batch! I still have and use the little norpro for small mixes in the bottle and it works well.
I have been reading some info on homogenizing eliquids and from what I can tell, a little heat and magnetic stirring or the ultra expensive ultrasonic stirring are the way to go. But who really knows?
Its like i like 10% Strawberry and others like 2%. :grinning:


#364

I am finding that my mixing setup is not creating the heat that your referring to! Played with a straight 30ml vg beaker and temps started at 76 and rose to 83 but never increased past the 83 degree mark. I checked the liquid temp every 15 mins with a digital instant read thermometer and let it run for 2 hours. I was bummed as I really wanted a bit of heat as i am stirring a mix.
Any ideas?
Edit: Made 120ml of one of my favorites today and the temp never went past the 85 degree mark. Used a larger stir barr as I was using a 250ml beaker. Left it on the mixer for nearly an hour before i was satisfied with the look of the bubbles. Bottled it up and into the cabinet it went.


#365

images


#366

Agreed, if I was doing anything over 100 ml, magnetic stirring would be my preferred solution. Even from 50ml in beakers it makes sense ( but in bottles it probably would not) How the lab manufacturers justify the prices they do for a motor with a coupled magnet is past me though.

Regarding ultrasonic mixing, I would need to experiment but I would be surprised if a Dremel with a smooth shaft did not get there at a fraction of the cost. I have seen commercial entry level units that look a lot like a Dremel and a smooth shaft :slight_smile:

Even went so far as to price components for a handheld ultrasonic mixer and it was not too bad, for a one off doable around 20usd with cheap RC motor/controller/battery


#367

Would love to know your results! I am thinking there is more to that unit that looks like a dremel tool than meets the eye.


#368

Thought about using ultrasonic mixing, looked at transponders and they were too dear, looked at the cheaper ones, thought of a knurled bit in Dremel, found someone had done with a smooth bit ( https://www.planetofthevapes.co.uk/forums/advanced-pv-mod-making-and-diy-discussion/mixology/threads/cheap-dremel-mixer.71608/ ), saw what looks a lot like cavitation, am convinced that it is pretty spot on.


#369

Nice, appears to be mixing that sample pretty good. For a straight piece of stock i wouldn’t have thought you would get that reaction. Will need to do some playing around with this.


#370

Also stumbled on this which might be of interests of the stirrers involved in this thread
https://proscientific.com/the-field-of-homogenizing


#371

I think the appeal of “magnetic stirring” is the notion that it’s a gentle homogenization (minimal froth). Anecdotal reports say yes, and it is a lab technique. Many of us just rely on a hearty shake and wait, which also has positive anecdotal reports. But consider Milk, the watery parts and the fatty parts are homogenized and that milk can sit in your fridge until it goes bad and there is no separation …true homogenization.

To what degree our DIY projects are truly homogenized, and whether that cuts steeping time is the debate. I mean we’re not mixing oil and water (milk), but if we employed commercial techniques would we get better (true-r) homogenization? Would Custards steep faster? Is there a better ghetto-cheap-@ss technique we can safely do at home? …I’m still considering running 500ml of Grant’s Custard through my WhipIt® (makes whipped cream from cream via a pressurized (NO2) bottle).

Hey? Vape Foams® …have your people call my people. Actually I thought I could shoot it into my Ultrasonic and degass …but that’s another thread.


#372

I absolutely agree. The subject is about as speculative as taste! Without doing testing on a molecular level and observing the transformation, I think it’s a guessing game. I personally like the stirrer for convenience. Mix it up and drop the stir bar in and let it go for an hour.
I have done two batches of the same juice and stirred one and shook one repeatedly. Observing the color change of the mix over time and from what I can see both are very close.
From what I have read and understand, the high dollar commercial homogenizers use a process of high pressures and shearing on a molecular level. Actually breaking the individual molecules down to similar sizes which creates an environment for the individuals to bond with each other. I am a simple DIY’er and have no issues mixing and stashing it away for a period of time for all the goodness to show itself!

Let us know how this works out! Would love some lemon tart whipped to go on top of my lemon tart! :joy:


#373

Well that may be a number one reason to employ a mag mixer. Easier is always better. Especially if you’re mixing larger quantities. A boost in your efficiency at that level just means more juice at the end of a mix session… it can be mixing itself while you whip up some more for the queue


#374

If I had the money, I’ll be switching over to Homogenizers, till then the stirrer will do :wink: