The Lowry process has the advantage that equipment for the
full-cell process can be used without other accessories that
the Rueping process usually requires, such as an air compressor, an extra cylinder or Rueping tank for the preservative, or a suitable pump to force the preservative into the
cylinder against the air pressure. However, both processes
have advantages and are widely and successfully used.
With poles and other products where bleeding of preservative oil is objectionable, the empty-cell process is followed
by either heating in the preservative (expansion bath) at a
maximum of 104 °C (220 °F) or a final steaming for a specified time limit at a maximum of 116 °C (240 °F) prior to the
final vacuum.