There has been much controversy about archival stability in silver based photographic materials for many years. In 1981 Ilford published it's research with guidelines for the most effective fixing and washing techniques of film and paper. It is these guidelines that I follow for final processing of all prints that leave my darkroom. Martin Reed of Silverprint in London published two articles in Photo Techniques magazine, the July/August 1996 issue and the November/December 1996 issue, which outlined and expanded on the Ilford technique and disposed of many myths about archival processing. It was exhaustive research to say the least. I highly recommend reading these articles if you need detailed information on the process. It is indeed a very serious and important issue that many labs simply do not consider fully. A guarantee for superior archival permanence stands firm at parisdarkroom.com.