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This may seem obvious, but I don't think anyone mentioned it. Wouldn't one way to differentiate between groove wear and a defect caused by some moisture-related phenomena be to look at the lead-in groove in comparison to the rest of the affected portion of the disc? That is to say, if the disc has groove wear caused by a worn/chipped stylus, the "haze" will be less prominent in the lead-in because the grooves are further apart, whereas a haze caused by moisture/mold would be more clearly visible in the lead-in groove area. No? Tim On Thu, Dec 3, 2009 at 3:09 PM, Roger Kulp <[log in to unmask]> wrote: > No damage from a worn stylus is very different.If this were a message board,I could post photos of both. > > > Roger > > > > > --- On Tue, 12/1/09, Steven C. Barr <[log in to unmask]> wrote: > > > From: Steven C. Barr <[log in to unmask]> > Subject: Re: [ARSCLIST] Pressing Haze: Help Needed > To: [log in to unmask] > Date: Tuesday, December 1, 2009, 5:58 PM > > > ----- Original Message ----- From: "Aaron Levinson" <[log in to unmask]> >> Don- >> You are suggesting that one pass with a very worn stylus produced this kind of greying? That seems kind of hard to fathom considering all >> the other anecdotal evidence that suggests that Mercury and Emarcy seem to exhibit this "record cancer" when almost no other labels do? >> I have seen many records that have been played by a worn stylus and are greying but none that I have ever seen, stop so abruptly as this record does. >> > Very possible! I once inadvertantly did the same thing to a LP disc I owned; > I had bought and installed a new LP needle, which turned out to be either > very damaged or mis-manufactured! I installed the new needle, then started > playing an LP disc...and noticed the disc was being "greyed" as it was played! > I took the needle back to the store, where they looked at it with their microscope > and told me to STOP USING IT! The disc thereafter played with much noise > audible in the greyed segment...fortunately, the album was still available, so I > bought a replacement. I could identify the damaged copy through the fact that > the first, and part of the second, cut was visibly "greyed!" > > Steven C. Barr > > > > -- Timothy Wisniewski, M.L.I.S. Visual Materials Archivist Alan Mason Chesney Medical Archives Johns Hopkins Medical Institutions 5801 Smith Avenue, Suite 235 Baltimore, MD 21209