Quote Originally Posted by bigsmokeringz

the darkness is due to different levels of creatine,minerals and other stuff in peepee.
Wrong. There is no meaning attributed to the intensity of a line. Even synthetic urine controls used for GC/MS calibration can produce a faint line on an assay.

A faint line in the Test region is still a negative. Even if an untrained tech would misinterpret a faint line as a "fail" and sent the sample off for GC/MS confirmation, the sample would still come back as negative.