Evaporation line? does evap line have color ( blue or pink ) or is it a different shade of white?

Question

took an ept yesterday and it was neg but today looked at it and it had a slight pos on it. i know you arent sup to look after 10 minutes cause of the evap line but my question is ...

is the evap line just the white difference that you see or will it have the dye ( ink) on it even though it is a evap line?

i thought that evap was just a white difference in the shade of white but it actually had the blue on it.

Answer 1

actually this same thing just happend to me. I took an EPT test and it ended up having a bright blue evaporation line. I tested again today and it was a BFN. Some people say they don't have color but trust me they do. I was heartbroken b/c I thought that I was pg and I even showed my hubby and he was like ohh yeah that looks positive but it was just a colored evap line. Neways best of luck to youuuu!!!!!!!

Answer 2

From my experience, the evaporatoion line had the pink dye and I got all excited but I had read the day after I took and read negative the first time. Retake another HPT and good luck and tons of baby dust!

Answer 3

The test is invalid.  You cannot call it a positive unless it was pink/blue within the time frame.

Blue dye tests are notorious for turning blue after a time - even a negative test.  It's a negative. Sorry.  It's happened to me before.

You should read this story about a test past the time limit...http://peeonastick.com/hpt/cautionary.ht...

Best of luck to you!

Answer 4

It all depends on the test brand. Wait a couple of days, and retest.  

Answer 5

Evap lines result with the test's antibody strip just looks slightly different than the space around it.  The Test/Result line turns pink only if pregnancy hormone is detected. If not, the moisture passes over this strip and does not turn pink. It may, however, become more visible when the light hits the moisture on the strip-- it may appear gray, colorless, like a "dent" in the test, or like a "ghost line." It may appear at any time-- as soon as the urine hits it, after a few minutes as the test absorbs the moisture, or after the 10-minute time limit. It may appear when the test is drying, or after it has dried. It may disappear as the test is drying, or after the test has dried, or not disappear at all

A real positive is identified by its color (pink or blue, whatever the color of the test's dye is) and its appearance within 10 minutes of urinating on the stick. A line that appears after 10 minutes, regardless of color, must be considered an evap line and is caused by the test's chemicals changing. HPT's are rapid assay diagnostics, which means any results appearing after the "rapid" time limit of 10 minutes are invalid.

Evap lines are simply caused by the moisture making the test's antibody strip more or less visible. (The antibody strip is what reacts with the chemical reagents to form a pink line when hCG is detected.)



I found the above info really useful today when trying to decide if my HPT (read after 4 mins) was an evap line or an actual positive.  Hope it helps you!