Fermentation must have atmosphere-lower amounts of necessary atmosphere the slower the fermentation process, OXiDATION. Temperature also plays roll...You can make tortillas on trail too....from scratch-lighter way of going! Folks do it at home-will try to post recipe. The vacuum pack beans works....really I think that I will stick to dehydrated due to the toxins exuded by certain protein consuming bacteria :o Not looking for that permanent face lift any time to soon  ;)