A testing kit is available for a quality assessment, however its use is highly complicated. The safest measure is to exchange the pre-treatment after 5,000 squaremetres or 10,000 plates. The costs of such a procedure are limited. The shelf life lies at approximately 8,000 squaremetres. If this limit is reached then a "loss of dots" will be experienced. A production error due to the plate not getting completely developed will occur. It is therefore recommended that you maintain a safety interval! The pre-treatment solution can be regenerated with the help of diglycolamine, but this is not recommended in terms of process reliability.