Archived posting to the Leica Users Group, 2004/08/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Once again, Dan, thank you for taking the time to respond. It's nice to have so many thoughtful and helpful people giving aide on the technical side of things! Adam On Mon, 2 Aug 2004 11:41:19 -0400, Dan Post <dpost@triad.rr.com> wrote: > Adam- > Again I may be late, but here is what I know! > Everyone knows that photographic chemicals are unstable- developer even in > tightly closed containers goes 'bad'- even fixer breaks down inside the > bottle. > The same thing happens when the chemicals are put into the sewage system, > or > even septic tank (if you don't over do it!)- they break down. Used fixer > can > pose a problem, but only if you are running a commercial lab and are not > using a silver recovery system. > I worked in a lab, and the MSDS's that Kodak provided indicated that the > current C-41 film chemicals, and the RA-4 paper chemicals are such that if > used according to instructions pose no hazard at all to the user or the > environment. They are largely organic substances that break down very > quickly in the environment. I called our local water and sewer department > to > find out what went into the water here- they actually add a certain number > of grains of hardness to help preserve the plumbing, and I asked a blout > photochemicals at the waste treatment plant- they said they are not a > problem- the big problem is run-off of chemical fertilizers from lawns, and > illegally dumped motor oil that gets in to the waste water stream! > Have no fear- you are not a bad citizen just because you dump out your > piddling little dribbles of chemicals! In the bigger picture, you are okay! > Dan > > > ----- Original Message ----- > From: "Adam Bridge" <abridge@gmail.com> > To: "Leica Users Group" <lug@leica-users.org> > Sent: Sunday, August 01, 2004 3:49 PM > Subject: [Leica] Disposal of chemistry > > > How are people disposing of used color chemistry? And black and white > > for that matter? > > > > Adam > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >