Archived posting to the Leica Users Group, 2010/03/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Marty, Thank you very much for the technical information. I was wondering what the PFOS is. -Pasvorn On Sat, Mar 20, 2010 at 5:33 PM, Marty Deveney <benedenia at gmail.com> wrote: > These are discontinuations by Fuji in Japan. These films are gone. > So, notably, is 120 format Neopan 400; which was discontinued because > it contained perfluorooctanesulfonic acid (PFOS) as a surfactant and > anti-static agent. PFOS was added to Annex B of the Stockholm > Convention on persistent organic pollutants (POPs) in May 2009: > http://chm.pops.int/Convention/Press...S/Default.aspx - Japan has just > passed legislation to take up these new controls. Hence Fuji can't > continue production of the current formulation. Communication has > been poor and Fuji haven't said if there will be a new formulation. > > PFOS is a powerful immunosuppressant, carcinogen and persists and > concentreates in biological systems. I'd have considered avoiding > using Neopan 400 120 had I known that the film contained PFOS. PFOS > can pass across skin; I am glad I've always worn gloves when > processing. It also shows that films are very complex chemically and > contain unexpected components. > > Marty > > _______________________________________________ >