After checking, packaging of the product begins in observance of validated procedures. For sterile products, the key point in this process is the clean room ISO 7 and ISO 8. Here, in a controlled environment and under the control of specialized staff, the various components undergo ultrasonic cleaning followed by drying. Then comes the primary packa- ging (blisters, tyvek pouches or vacuum pouches), guaranteeing absolute protection from external pollutants. The packaging process ends with labelling and the insertion of the blisters in special boxes which are protected from dust by means of a transparent shrink-wrap film. The products are then sent for the sterilization process by external supplier with validated sterilization cycles.