Evaporation lines on pregnancy tests are generally colorless, but not always. Some evaporation lines do have color—either a light blue or light pink. The color, however, is very faint and not as dark as the color of the control line.
What is an evaporation line on a clear blue pregnancy test?
Evaporation lines are common and can occur with any pregnancy test. An evaporation line is a line that appears in the results window of a pregnancy test as the urine dries. It can leave a faint, colorless line. If you’re not familiar with evaporation lines, you might see this line and think you’re pregnant.
Is a clear blue EVAP line blue?
Each pregnancy test is different, with some brands using a red dye and others, like Clearblue, a blue dye. For a red dye test, a faint line will look light pink, whereas a blue dye test will produce a light blue line. See images below to get an idea of what a faint line can look like.
Can evaporation lines have color?
The key difference is that an evaporation line is colorless (which may appear as a faded gray on most tests). This is an important distinction because if your test is positive, the line that tells you it’s a positive result will appear in the same spot as the evap line—but will have some color to it.
Does an evaporation line on a pregnancy test disappear?
Evaporation lines happen when the urine that was on the test area starts to dry. The chemical composition of the urine sample changes due to evaporation. As a result, the test may start to display a positive line. After the allotted time has passed, you should discard the pregnancy test to avoid confusion.
Do EVAP lines show on inverted pics?
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.
Will an evaporation line disappear with water?
Will an EVAP line washed away? It should be very visible and remain visible even after 48 hours. With most brands of home pregnancy tests, the positive test line never fades away.
Does a faint positive get darker when it dries?
That’s because the results are accurate when the urine is still wet. Once it dries, urine may leave a faint line where it evaporated – an “evap line.” Unlike positive result lines, which are usually dark or bright, an evap line will be colorless.
Can a thin blue line be positive?
Even a very faint, pink Test Line and a blue Control Line is a POSITIVE result. The intensity of the lines may vary. Before you start testing, wash your hands or use hand sanitizer. Make sure your hands are dry before starting.
Is a clear line on a pregnancy test positive?
If you take a home pregnancy test and the results reveal a faint positive line, there’s a strong possibility that you’re pregnant. Some women see a clearly distinguishable positive line after taking a home test.
