Do evaporation lines get darker each time?

[HandBtryingforababy]

I've taken a few tests recently, I have had 3 negative and then 2 with lines but not 100% sure if they are evaporation lines, the first one was a very very thin line, and the second one it looks thicker (picture of the thicker one below) I am waiting to see if af starts now instead of carrying on testing

I will say this a positive test

That one looks positive to me. Try a pink dye frer test, but that absolutely looks blue and thick, so I think that is a positive test ☺️

That looks positive! Did you get your official BFP OP? X

Unfortunately I got my af yesterday 😪 x