Evap Lines

Kris
So I posted this one someone else's topic to show her an Evap line and got told it's not an Evap need opinions please...... Top picture is last nights test it looked negative so I put it in the drawer and went to bed looked at it this morning I no that's bad but I never get Evaps. And there was my Evap line. Took another this morning (bottom picture) around 6:30am couldn't really tell if there was a start of a line or not so left it and went back to bed a little before 10 looked at it there was a line left it looked at it again and the line is darker now. So my question is does this test just take a long time to show up or am I right about it being an Evap? I have probably 15 other tests that are negative and stayed that way.