Mr.Goldman Surely you're not suggesting that any manual drying with any kind of cloth or brush is as thorough as a thread connected to a powerful vacuum that lifts the cleaning fluid residue and whatever else remains at the bottom of a groove out and removes it completely. db Sent from my iPhone > On Jan 16, 2016, at 1:19 PM, H D Goldman <[log in to unmask]> wrote: > > Hi Frank, > > I’d suggest that the first the evaluation of a cleaning approach is thru listening before & then again after the cleaned disc has been played several times. The safety of the chemicals involved can be evaluated readily from their known chemical properties & simple testing. Further validation comes from long term study of treated surfaces under environmental challenge. Ultimately it comes down to the perceived value of the cleaning itself. > > Finally you run larger studies of the approach involving varied substrates & end user methods. > > Electron micrographs & vibrational correlations are a wonderful idea but they won’t change the real-time data that has already been accumulated by tens of thousands of users over 25+ years. > > Regards, > > Duane Goldman > > H D Goldman Lagniappe Chemicals Ltd. > PO Box 37066 St. Louis, MO 63141 USA > v/f 314 205 1388 [log in to unmask] > > > > n Jan 16, 2016, at 11:20 AM, Frank Strauss <[log in to unmask]> wrote: >> >> I have viewed this subject on the ARSCLIST several times over the past >> >> several years, often with a fair bit of >> flame >> attached, and I think Tom is right. Someone needs to study the effects >> of different cleaning regimens >> scentifically. Anybody can say their system is the best, but until >> someone actually examines the whole groove before and after cleaning, there >> is no way of knowing for sure. How to examine the whole groove before and >> after cleaning is a grand question. Can you do it with an optical device? >> >>> >>> >>> >>>> Date: Fri, 15 Jan 2016 07:16:30 -0500 >>>> From: Tom Fine <[log in to unmask]> >>>> Subject: Re: Cleaning stylus >>>> >>>> Hi Steve: >>>> >>>> Could you cite the presentation, preferably a link to the conference >>> page? I would like to study >>>> that presentation, see what their methodology was. LOC has resources >>> where we may have the >>>> microscope photos and the like. I also hope they addressed the issues of >>> every day cleaning of >>>> regular records, not just fragile problem cases. >>>> >>>> -- Tom Fine >>>> >>>> ----- Original Message ----- >>>> From: "Steve Smolian" <[log in to unmask]> >>>> To: <[log in to unmask]> >>>> Sent: Thursday, January 14, 2016 9:59 PM >>>> Subject: Re: [ARSCLIST] Cleaning stylus >>>> >>>> >>>> The results of the Library of Congress' rigorous testing of record >>> cleaning products were presented >>>> by them at a recent ARSC Conference- last year of that of the previous >>> one. >>>> >>>> Though not named, the product that best the others, and by a >>> considerable margin, was Disc Doctor. >>>> There are legal reasons such Government testing does not identify >>> products going back to NSIT's >>>> earlier days. The presentation was made in such way, however, that it >>> was murkily clear that Disc >>>> Doctor prevailed, and this was confirmed to me privately elsewhere. >>>> >>>> Steven Smolian >> >> >> -- >> Frank B Strauss, DMD