Hello TechNet: We are searching for a method of accelerated aging of PCBs with surface finish in white tin (chemical tin). This method should be recognized , in order to simulate the storage of 6 or 12 month under normal conditions. (85/85/1d or 2d test ??) After such an accelerated test, the solderability will be tested by the wetting balance method. Thank you for your answer With best regards Peter Hefti