Evap/faint line

No matter how faint it is, this line is considered a positive and is an indication that you took the test too early—most likely right after implantation when hCG levels are still low—or your urine was diluted. An evaporation line appears after the allotted reaction time and is virtually colorless. When an evaporation line appears, it is best to take another test for an accurate result. Evaporation lines only appear on tests that show negative results. A positive test would change color in the same spot, blotting out the evaporation line. Saying that ANYTHING pink at all (assuming a pink dye is used) when inverted will turn green. An evap line that's usually grey or whitish will remain a dull color. ... If so then there's only one reason you'd get a slightly glowing green line while inverted, meaning BFP. (Blue will turn orange when inverted) Drinking a lot of liquid before testing can leave you with a faint positive line, or if you're testing early, even a negative result. It may be easy to think a faint line is a false positive, but it's very, very rare to get a false positive result. Also, when having a chemical pregnancy (early miscarriage) you will get positive until hcg is out of your body. (Most of the time). Even when a faint positive is shown with pink or blue dye and you end up not pregnant it can be due to a chemical pregnancy (early miscarriage). In early pregnancy, there may be very little hCG in the urine, and the positive line may be faint. Even a faint positive line has color, and this distinguishes it from an evaporation line, which is colorless. Any coloration in a positive line indicates that a woman is pregnant.