what does an evaporation line look like?

Question

i have a test, that i seen the line when it first came on the test before 2 minutes but didn't really pay attention because i thought it had to be darker. now i can see it better since it's dry and it's definatly a thin blue line. i heard evaporation lines don't exhibit the color of the dye. that they are usually grey? is this true?

Answer 1

That's true, an evaporation line will simply look sort of greyish. The blue is the result of a chemical reaction and is definately there, faint or not. Congratulations?