Also, local propane companies subsidized investments in propane burners.
The spray was applied at a pressure of 2.5 bar, using propane gas as the propellant.
We chose to use propane because of its ready availability.
Like propane, it can be used effectively in existing traditional kilns and requires a minimal investment on the part of individual brickmakers.
A loose fitting lid over the aluminum container helped to keep the propane gas contained until it cooled sufficiently to be maintained as a liquid.
Rapid freezing was performed either by immersion in liquid propane (4) or by using a high-pressure freezer (5).
We propose that rapid freezing by immersion into a suitable cryogen such as liquid propane, with subsequent freeze substitution, is a suitable alternative approach.
The initial ignition of the gas whereby the flame first comes into existence corresponds to the act of creation, while the continuous supply of propane corresponds to ongoing conservation.
