While the materials used in making briquettes are important, you must pay close attention to the quality of the machine as well.
A good machine is one which is able to provide you with sufficiently hard but nit very hard briquettes.
Honeycomb Briquette Machine
A good machine will run at very high temperatures without causing too much damage to the briquettes. The machine has to possess the ability of giving you the hardened briquettes you are in need of, while ensuring that they will burn easily. Look for a machine that is easy to transport from one location to the next. It ought to be convenient to your needs at home or for commercial uses.