I know for sure there is something to the dim line versus a dark line. I've used the same test and watched it go both ways. I don't think these tests are so sensitive to detect the difference between 49.9ng and 50.1 ng. So the difference in color MUST have something to do with the level if not a complete quantitative reading.
As youve been informed in your own thread (in which the topic itself needs to remain in that thread, rather than highjacking other threads), if this was actually true, then
synthetic urine controls wouldnt be producing faint lines on any drug assay.
Again, a negative is a negative. Youre worrying yourself over nothing.

I don't think any of these guys who say "a line is a line" would want their employer seeing a line that is barely visible.
Uhh..I wouldnt want my employer conduct any of my U/A's, let alone see if the U/A has a line. Thats because my employer is not certified & authorized by the DHHS to collect and analyze samples.

And more likely than not, yours isnt either. Thats the job of the facility.
Burnt Toast Reviewed by Burnt Toast on . How can I possibly be clean? (Chronic users please chime in) Like so many of us, I am faced with a terrifying pre-employment screen coming up. (10 days from today, hopefully longer) Fortunately, and unlike a lot of poor souls, I was able to give myself as much time as possible. I last smoked December 15th. (29 days ago) I consider myself very well educated on all things drug testing related, but I am confused as to how I began testing clean at only 23 days - given my very slow metabolism, lack of exercise, and chronic use. (which is noted below) Rating: 5