One inconvenience when pressing straw materials is the
long de-gassing time necessary to avoid delamination of the
pressed panels. To overcome this obstacle, an extra feature
was added to the press heating system: Oil at 60–80 ◦C was circulated
through the press plates for cooling. This arrangement
reduced the build-up of steam pressure inside the fibreboard
at the end of the press cycle. The cooling time was one-third
of the total pressing cycle and is included in the total pressing
time