#test-results 2026-06-02

while im here how many lots do you need before you can say anything about a supplier

test it again

one data point

log the boring ones

while im here does anyone log the negative results, the boring ones

one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally

99 against a certificate of 99.2 is fine. the same supplier landing low four times in a row is a question

slightly off topic but my sheet has 5 lots from HJ with a spread under a point, which is tight, i have it written down somewhere

is anyone tracking results over time in a way they would share

post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later

if you are testing to settle an argument you will not settle it with n of 1

attach the pdf

a supplier disputing a result is rare here and it has never gone well for the supplier

coming back after 22 months with a follow up result, where do i put it

nice result

my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ

i test roughly every tenth vial. it is a sampling strategy, not paranoia

the honest limits: hobby chain of custody is weak and any result here should be read with that in mind, thats just me