Another problem worth noting was that the 180 deg F fibers were arced, which may be due to the fact that they naturally rested on the bottom of the vials on the hot plate, so one side of the fibers possible got hotter and therefore expanded more than the other side, causing the fibers to bow. | Another problem worth noting was that the 180 deg F fibers were arced, which may be due to the fact that they naturally rested on the bottom of the vials on the hot plate, so one side of the fibers possible got hotter and therefore expanded more than the other side, causing the fibers to bow. |