I may have been wrong (But I don't see where to delete this post) but i just discovered that in some cases, these tests actually do the test right on the stick and have specific spots designed to turn pink, or not turn pink. The test I took was very similar to the one below:

Saliva Drug Testing - Oral Drug Test Kits

*WITH*

"Positive: A rose-pink band is visible in each control zone. No color band appearing in the appropriate test zone indicates a positive result for the corresponding drug of that specific test zone.

Negative: A rose-pink band is visible in each control zone and the appropriate test zone, indicating that the concentration of the corresponding drug of that specific test zone is below the detection limit of the test."

What I do not understand is they have told me from the start that this would be long process and they would not get the results back from the lab for 6 days. They insisted they send it to a lab. Would this make sense if the stick was an instant chromotgraph result?