The marks visible on a finished part made by two flow fronts, traveling in opposite directions, meeting during molding. Areas in the part where two different fronts of molten plastic have come together at a "meeting" angle less than 135°F.

The marks visible on a finished part made by the meeting of two flow fronts of resin during molding.

A visible line created on the surface of a molded part caused by two flowing streams of plastic joining with the cavity as the cavity is filled.

See “ knit lines”.