Here's what each signifies on a pregnancy test, and how to tell the difference. Verkkosometimes evaporation lines and faint positive pregnancy test lines can appear similar. This article explains the differences between a positive. Verkkoin some cases, what looks like a positive pregnancy test result may actually be an evaporation line, also called an evap line. Here's how to tell the. Verkkoan evap line (evaporation line) is a faint line that appears after a negative test has dried. Because tests are typically meant to be read three to five. Verkkofaint positives on pregnancy tests appear within the reading window and are lightly colored, often indicating early pregnancy. Evaporation lines show up.
