Negative pressure in bottle?

[RagenMMA]

I've noticed that some of the bottles i open, whether they are peptides or AS have too much air in them. So basically the first injection after I crack the lid the plunger has resistance and pulls back. After i'm done and pull needle out air along with product spews out. Anyone have this experience? Is it something the manufacturer does incorrectly?

 

[FrankieFit]

Push air into the vial first to cause an over pressure. When you draw it'll equalise the pressure. When you remove the needle make sure the vial is the right way up so any further equalisation does not cause product to spew out.

 

[RagenMMA]

the bottle already has to much pressure and it's hard to push anything in. In order to equalize you'd need to pull out and extract the air pressure. Just saying, it happens on some but not on all. Pisses me off cause it goes every where. Has to be a home brew issue wouldn't think pharma grade would have that issue

 

[FrankieFit]

Oh okay you mean there's built up pressure INSIDE the bottle? Sorry I misread your post.

I've never had that sorry mate. I'd say shove it in the fridge first but that'd thicken the oil.

Suppose just try and make sure only air comes out aha.

 

[MrManuel]

Just put a pin in it and vent that bitch

 

[RagenMMA]

Just put a pin in it and vent that bitch

Done! Just wonder why it happens. Pisses me off