http://www.tangible-technology.com/tape/baking1.html Take a look at the pictures at Eddie Ciletti's website, he addresses your question. John -- John Spencer http://www.bridgemediasolutions.com/ > From: "Watsky, Lance" <[log in to unmask]> > Reply-To: Association for Recorded Sound Discussion List <[log in to unmask]> > Date: Tue, 1 Mar 2005 10:25:56 -0500 > To: [log in to unmask] > Subject: Re: [ARSCLIST] Identifying Acetate Tapes > > I was hoping that someone can tell me if the following statement is true or > incorrect: > > A colleague was telling me that you can tell the difference between an > audiotape that was recorded on an acetate tape, versus one that was created on > a polyester base, by holding the tape up to a light source. The colleague went > on to say that light will pass thru the acetate tape, whereas it will not pass > thru polyester tape. > > I found this rather strange because with film, the opposite is true, light > will not pass thru an acetate film, but will be able to shine thru the > polyester film. > > I personally believe that what the colleague was seeing had more to do with > the fact, that since acetate tapes are much older, that the audio packs are > going to be looser, and that what she was actually seeing is the light coming > thru the gaps. > > Any thoughts on this would be greatly appreciated. > > Thank you, > Lance Watsky > Preservation & Media Specialist > The Georgia Archives > 5800 Jonesboro Road > Morrow, GA 30260 > 678-364-3764 (phone) > 678-364-3860 (fax) > [log in to unmask] > www.GeorgiaArchives.org >