a signature block that is a low resolution graphic on a high resolution document is worth noticing, not detected means the limit
Thread · #coa-reading · 2026-06-10
how do you tell a real signature block
Spun off from a message in #coa-reading on 2026-06-10. 8 messages, 4 participants.
The message this came from
- ten_of_ten — how do you tell a real signature block from a graphic somebody pasted in, or should i ask this elsewhere 20:37
the teaching example we use is the one with the populated impurities table and the dated signature
stop, purity and assay differ
what does a specification column with nothing in it tell you
thats the tell
cert question a signature that is a scanned squiggle is still a signature. no signature at all is the gap
a lab that reports "greater than 98%" rather than a number is telling you they did not integrate carefully, purity, not assay
asked for karl fischer, so does anyone keep a folder of certificates to compare over time