Arc Flash Boundary (ARC) - is the distance at which an electrical arc can flash. outward, which may endanger employees working on electrical equipment. Flash Protection Boundary (FPB) - theJcalculated safe working distance from. electrical equipment which would not expose the employee to the hazards.
One advantage of freeze drying is that food preserved in this method can last longer than food preserved in virtually any other way. Freeze dried foods, if stored properly, can last for years, even decades, and taste exactly as they did the day they were bought fresh.
Freezer burn is actually caused by the drying out of the surface of food when in the freezer. The atmosphere in a freezer is extremely low humidity, just like a house with central heating in the winter. You can help prevent it by wrapping the food really well before you freeze it.