The Daily Insight

Reliable news and clear analysis on the stories that matter.

education insights

What color are evaporation lines on pregnancy tests?

Writer Ava Barnes
Evaporation lines are colorless streaks, not faint lines. They typically appear if a person waits for longer than the suggested time to read the test result. An evaporation line can also appear if the test gets wet. An evaporation line does not indicate that a woman is pregnant.

What does an EVAP line look like on a 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.

Can evaporation line be pink in Colour?

Evaporation lines on pregnancy tests are generally colorless, but not always. There are some evaporation lines that do have color—either a light blue or light pink.

Can an EVAP line be blue?

While an evaporation line can appear on a pink or blue dye test, many frequent testers on popular online pregnancy and fertility forums adamantly argue that blue tests are more prone to these deceptive shadows.

Can evaporation line get darker?

If you follow all of the instructions correctly, you may notice a thin, faint test line that appears within a few minutes. It can seem at first that the line is too faint to count, but after 10 minutes, it darkens.

What color is a evaporation line on pregnancy test?

How do you tell if it's an EVAP line or positive?

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. If a person sees an evaporation line, it means that the test is negative, or it was taken too early in the pregnancy to show a positive result.

Do evaporation lines disappear with water?

Unfortunately, evaporation lines will not disappear, even when you try to remove them with water. If you are not confident with the pregnancy test result, it's highly recommended that you take another test, taking care to follow the instructions properly, to avoid a false positive pregnancy test result.

What Colour are clear blue evaporation lines?

On a blue dye test, the line can appear as gray or even a lighter shade of blue. (Note: For some reason, anecdotally, many mamas find that blue dye tests are more prone to evaporation lines.) Sometimes, though, the evaporation line appears as a colorless streak, almost like an indentation.

What is the difference between evaporation line and faint line?

An evaporation line on a pregnancy test is a faint line (or rather, mark) caused by a test reaction that occurs when the urine evaporates, or when the test gets wet. Sometimes this line appears in the test window, making it look like a faint positive result. Evaporation lines are colorless streaks, not actual lines.

What does EVAP line look like clear blue?

What does a faint line look like? 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.

Can a pregnancy test show positive if it sits too long?

The tests ability to detect HCG hormone will be higher allowing an earlier positive result if you are pregnant. Usually the tests recommend waiting about 3 minutes before reading it. If you let the test sit too long the the test may show a false positive result.

Do all pregnancy test show evaporation lines?

Pregnancy tests may show a small evaporation line where the positive line should be. Evaporation lines are not faint lines, but rather colorless streaks. They appear if a person waits longer than the recommended amount of time to read the results of a test.

Are evaporation lines colorless?

This is normal and a part of the process but leaves behind a colorless but distinct line. 2 The evaporation line does not show up until after the pregnancy test reading window of time to accurately get your results.

Are EVAP lines pink on first response?

There should be at least one pink line in the FIRST RESPONSE™ Result Window after this time to indicate that the test is completed and you have done it correctly. If at 5 minutes there are no lines within the FIRST RESPONSE™ Result Window the test is invalid.

Can a faint line on a pregnancy test appear later?

If you check your results within the recommended time frame and see a faint positive line, you're most likely pregnant. On the other hand, if you miss the window for checking the results and you don't check the test until 10 minutes later, a faint line may be an evaporation line, which means you're not pregnant.