Does anyone know how soon after the time stated for the result to appear can an evap line appear?

For instance, I have 2 different brands of early pregnancy tests and both show an extremely faint line. The thing is these lines developed pretty much from the 5 minute mark, so as long as it takes to show a result.

I have googled and read that this can happen with a positive especially before AF is late but the box does say to disregard anything after 5 minutes... I don't know exactly how long it was as it wasn't a digital clock but it was about 5 minutes i could see the lines then sure they were there between 6 and 10 minutes, they haven't changed since.

Love to hear your opinions!