How To Read A T Cup Drug Test. If a test fails to show a line in the control region, this indicates and invalid test result. If the colored line appears in the control region but not in the test region, the test is considered to be positive.
Peel back the label to reveal the drug test panels and read the results at 5 minutes. How to read icup drug test. If there is a line in the control region but no line in the test region, then the.
When no line appears in the test region (t) but a colored line is displayed in the control region (c), the drug test result is positive.
Wait for 5 minutes to confirm the result. Whenever there is even a faint pink line. It indicates that the concentration of the corresponding drug of that specific test zone is zero or below the detection limit of the test. T or test line on a drug test negative:* a colored line appears in the control region (c) and a colored line appears in the test region (drug/t) next to a specific drug tested.