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I understand the concern, but it's really unlikely switching stoppers and caps will cause a price increase. The "good ones", bought correctly, are close to the prices of the junk, or just a few cents more.

Once we convince him to switch from cheap Chinese borosilicate vials that delaminate glass shards and leach boron into the oil, to something better like Corning Valor vials.... that may up the price a dollar or two lol.



View: https://youtu.be/Ag0Yya6jK3E

The glass flakes off the vials? Please explain this to me but as if I had a handful of extra chromosomes that aren't supposed to be there.
 
but until glass vial rims are corrugated/pleated/textured/whatever to provide some friction, metal crimp caps are going to slide over them and spin.

Just to clarify on this, the reader can go back to the video from up above with the guy crimping the glass vial with stopper and west pharma seal.

If the vial is properly crimped then the aluminum shell is providing a significant normal force pressing the rubber stopper flange against the glass vial lip. The coefficient of static friction (and resultant fractional force due to applied normal force) between rubber and glass provides the resistance to any applied torque on the aluminum shell as one tries to rotate it.

So if the aluminum shell is freely rotatable, that means that either (1) the stopper is also rotating with respect to the glass vial or (2) the aluminum shell isnt even really engaging the rubber stopper and the aluminum is slipping over the rubber stopper. In either case, the applied normal force by the undercrimp is inadequate for the job.

Fwiw.


View: https://youtu.be/7NyVKMOSuOM
 
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Just to clarify on this, the reader can go back to the video from up above with the guy crimping the glass vial with stopper and west pharma seal.

If the vial is properly crimped then the aluminum shell is providing a significant normal force pressing the rubber stopper flange against the glass vial lip. The coefficient of static friction (and resultant fractional force due to applied normal force) between rubber and glass provides the resistance to any applied torque on the aluminum shell as one tries to rotate it.

So if the aluminum shell is freely rotatable, that means that either (1) the stopper is also rotating with respect to the glass vial or (2) the aluminum shell isnt even really engaging the rubber stopper and the aluminum is slipping over the rubber stopper. In either case, the applied normal force by the undercrimp is inadequate for the job.

Fwiw.


View: https://youtu.be/7NyVKMOSuOM

Something about physics and then I got a little lightheaded. The CrimpPimp strikes again!
 
Just to clarify on this, the reader can go back to the video from up above with the guy crimping the glass vial with stopper and west pharma seal.

If the vial is properly crimped then the aluminum shell is providing a significant normal force pressing the rubber stopper flange against the glass vial lip. The coefficient of static friction (and resultant fractional force due to applied normal force) between rubber and glass provides the resistance to any applied torque on the aluminum shell as one tries to rotate it.

So if the aluminum shell is freely rotatable, that means that either (1) the stopper is also rotating with respect to the glass vial or (2) the aluminum shell isnt even really engaging the rubber stopper and the aluminum is slipping over the rubber stopper. In either case, the applied normal force by the undercrimp is inadequate for the job.

Fwiw.


View: https://youtu.be/7NyVKMOSuOM


Saying that loose lids are bad and should be improved sounds pretty reasonable to me.
 
Something about physics and then I got a little lightheaded. The CrimpPimp strikes again!
Lol.

Is it so loose the stopper can travel axially to any real extent or leak? No. Doubtful. Inverting a vial I don't see any air intrusion. Will check a few more.

Could it be more snug? Sure.
 
Lol.

Is it so loose the stopper can travel axially to any real extent or leak? No. Doubtful. Inverting a vial I don't see any air intrusion. Will check a few more.

Could it be more snug? Sure.
Exactly. If i stick a needle below the stopper, but above the oil, I can pull back the syringe and not get any air leakage.
 
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bloodwork on 200mg primal cyp. drawn morning before pin.
called quest yesterday for update on estradiol results was told wont be ready until October 3rd now.
 

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Placed a small order during the flash sale. Product arrived 2 days later. It was packaged really well. I won't be using it for a while so I can't comment on the gear itself but i look forward to it.
 
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