ECL
The ECL label is used to add content to a label. The limited space on a standard label makes it difficult to display all of the content that is required on some labels. Because reducing the type size affects the readability, some companies have started to use an extended content label (ECL) to satisfy their content needs.
Some ECL labels are printed on the back side of the label and some have extra folded pieces attached that are unfolded to reveal the additional content.