VipRoids
Well-known member
Everyone inspects their vial for floaters and treats anything visible as proof of contamination. Meanwhile the most common source of particles in a punctured vial is introduced by the person holding the needle, and it comes from the stopper itself.
Push a needle through a rubber septum the standard way, straight down, and the coring effect can shave tiny cores of rubber off the stopper and drop them into your solution. Experienced lab handlers punch at an angle and know this, because particle fragments injected under skin are foreign bodies, and the body walls them off. Users here pierce the same vial dozens of times over weeks, straight down, every time, which means the probability compounds with every draw and almost nobody connects the little discomforts of the following days to the technique from weeks prior.
The absurd part is that the community polices the purity certificate of the powder and then routinely injects shavings of the packaging, drawn up through the same needle that created them. Verification ends at the label when the real materials science begins at the stopper.
Who was taught angled punctures and who learned it today, and be honest, has anyone here ever drawn up something dark and realized with a delay what it probably was.
Push a needle through a rubber septum the standard way, straight down, and the coring effect can shave tiny cores of rubber off the stopper and drop them into your solution. Experienced lab handlers punch at an angle and know this, because particle fragments injected under skin are foreign bodies, and the body walls them off. Users here pierce the same vial dozens of times over weeks, straight down, every time, which means the probability compounds with every draw and almost nobody connects the little discomforts of the following days to the technique from weeks prior.
The absurd part is that the community polices the purity certificate of the powder and then routinely injects shavings of the packaging, drawn up through the same needle that created them. Verification ends at the label when the real materials science begins at the stopper.
Who was taught angled punctures and who learned it today, and be honest, has anyone here ever drawn up something dark and realized with a delay what it probably was.