to a normal saline solution 0 9 sodium chloride and soaked for 4 8 hours with slight agitation during this period acceptable cleaned umbilical cord segments of the collagenous tissue membrane 20 must be transparent in color free of meconium not fragile and exhibit normal tissue integrity the cleaning process of the umbilical cord is performed inside an iso class 5 class ii biological safety cabinet bsc that is located inside an iso class 5 suite in a cleanroom the process of cleaning the umbilical cord is performed as such to leave the structural and chemical properties of the membrane 20 intact once the umbilical cord segments of the collagenous tissue membrane 20 are cleaned and meet the aforementioned acceptable criteria they are then prepared to undergo the vacuum drying process the cleaned umbilical cord membranes 20 are placed on a sterile plastic tray with the inner lining of the umbilical cord facing upwards and the epithelial side facing downward a layer of medical grade foam is then gently placed on top surface or side 22 of the tissue membrane 20 and lightly pressed to ensure the membrane 20 has completely adhered to the foam the foam is gently lifted off the plastic tray and turned over exposing the epithelial side 21 of the umbilical cord another layer of medical grade foam is placed over the umbilical cord membrane 20 sandwiching the tissue membrane 20 in place the sandwiched tissues are placed into sterile drying trays with the epithelial layer side 21 facing upwards the drying trays are.