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.
The quality of freeze dried products is the highest quality, mainly because the temperature stays low during the whole process. Through the low temperature the aroma stays intact and there occurs no change of colour, which is the case with spray drying. Nowadays the largest part of instant coffee is freeze dried.