#test-results 2025-05-13

do the results in this channel skew because people test when suspicious

Channel stats, last 30 days: 97 messages from 40 members.

while im here my result contradicts the supplier certificate, do i tell them

99.2 against a certificate of 98.1 is fine. the same supplier landing low four times in a row is a question, ill dig out the number

a point or two between the certificate and an independent result is inside what two labs disagree by

underfill is more common than impurity. if you only test purity you are testing the less likely failure, n of 1 obviously

i test roughly every tenth vial. it is a sampling strategy, not paranoia, take that with a pinch of salt

log the boring ones

slightly off topic but the widest spread in my data is about 2.6 percentage points across five lots from one supplier

quantity testing is usually a separate line item and it is the one worth paying for, happy to be corrected

when did you buy it