Will Military Compressed Biscuits Swell After Absorbing Water?

A guy was particularly curious about the structure of military compressed biscuits. Since army biscuits are compressed, will they expand after absorbing water?

So the boy decided to do an experiment. First, he put the compressed biscuits in cold water and found that there was no change, so he was ready to boil the compressed biscuits with boiling water to see if the compressed biscuits would expand after absorbing water.

As a result, after boiling for half an hour, it was found that the compressed biscuits were not dissolved. The military compressed biscuits did not begin to boil until they were boiled for another hour. The whole pot was filled with pasty paste. After boiling until it was completely boiled, the compressed biscuits filled the whole pot.