The security marks on chips? I bought a cheap black light and went through my 50 cent Argosy chips. I found the mark that is horizontal, but could not see any vertical marks like Greg's CG1292. With my light it was either there or it wasn't....no in between. I have about 25 chips with absolutely no sign of the UV marking. Greg, how did you get your good image of that CG1292 chip?