If the intention is to sell the tested production volume once the aseptic system has been validated, the intrinsic quality of the product must follow the customer's specifications.
For the microbiological validation of low acid aseptic lines a culture medium is used to enable visual inspection. Alternatively, the customer’s product may be used, e.g. UHT milk or others.
For the microbiological validation of high acid aseptic lines a clear product (e.g. apple juice) is used to enable visual inspection.
