100 degF alone should not degrade DVD discs. However, both DVD's and oil are
organic materials and could interact. Chemical reactions are usually
accelerated by higher temperatures.
Media Sciences, Inc.
> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
> Sent: Wednesday, October 05, 2005 3:09 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] water damaged cds
> In one of the posts, Joe indicated that he had tested DVD's in "room
> temperature" water. In general, I'm assuming that means somewhere in the
> to 72 degree range. I was in New Orleans a week before the hurricane and
> temperatures were nearing 100 degrees during part of the day. With no air
> conditioning, after the hurricane, actual exposure temperatures could
> reach into the 90's or higher.
> As for contamination: salt, sewage and chlorine are known to accelerate
> decay in magnetic tape. I haven't read any research, however, on which
> particular chemicals are most likely to damage the glue layer on DVD's and
> penetrate the discs. Interestingly enough, MP and ME tape recovered from
> the flood waters that show obvious contamination from oil, are showing
> immediate chemical decay than those exposed only to salt or sewage
> contaminated water.
> Peter Brothers
> > -----Original Message-----
> > From: Association for Recorded Sound Discussion List
> > [mailto:[log in to unmask]]On Behalf Of Dave Bradley
> > Sent: Tuesday, October 04, 2005 9:36 PM
> > To: [log in to unmask]
> > Subject: Re: [ARSCLIST] water damaged cds
> > >While I have not examined any of these discs, it appears that
> > >in contaminated water at elevated temperatures can damage some DVD's.
> > I'm curious about what you mean by "elevated temperatures" ?
> > Meanwhile, remember that the contamination in the water is
> > sewage, as well
> > as chemicals for treating it that were washed out of the treatment
> > with the sewage, as well as petroleum based chemicals (which will do a
> > number on the plastics on an optical disc). That's GOT to be
> > rough on the
> > DVDs.
> > -----------------
> > Diamond Productions
> > Specializing in analog tape & film preservation / restoration in the
> > digital domain.
> > Dave Bradley President