VinceInMT
Subscriber
Do these 1960s and 1970s reel-to-reel tapes play properly? Have you experienced issues with failure of the substrate or with data loss? In science agencies, this is a problem with the 9-track tapes that supplied data for mainframe computers. (Some of the subsequent data storage mediums have also been problematic.)
When I was in high school in the late-1960s and early 1970s, I recall that record stores in Harvard Square (Squay-yah), Massachusetts, sold classic music as LP record and reel-to-reel tape. I do not remember if much was yet offered on cassette; that may have come 5 or 10 years later. I do remember early-vintage cassette decks with the Dolby noise reduction chips. I still have some of the LPs that I bought back then, which I play on a Linn Sondek. A roommate had a reel tape deck but I never owned one.
As Agulliver said, there is a sticky shed problem with some tape stock, notably from Ampex, but in my experience that has not been a problem with any of the prerecorded tape I have. There is a baking process by which one can recover a shedding tape for one play allowing a backup. The problem I've run into are a few tapes, usually of the back-coated type, that have lost their lube and they "stutter" when going past the playback heads and guides creating a whistle. With those I use the "Nu-Finish" treatment. I get a bottle of Nu-Finish car polish and mix it, 1:1 I think, with naptha and then let it sit overnight to let the solids settle out. I then take the clear liquid on top and use it on a cotton pad to re-coat the tape as it winds on a machine from one reel to another. This has worked very well on every tape EXCEPT RadioShack Concertape, 2 reels of which I am still trying to recover.
It is amazing how well tape holds up over the years. As I mentioned on a previous comment I've picked up numerous reels at estate sales, primarily looking for recordings made off the air. About 20 years ago the greatest find were about 200 reels of tape from the late 1940s. This tape was made with a paper backing, before acetate or mylar were used, and they sound just fine. The magnetic particles still stick to the paper. I went through those tapes, digitized them and put that project on my web site here:
http://www.otrannex.com/papertapes/
To keep this sort of on topic, photographically speaking, I am currently scanning all my late fathers color slides from the 1950s to the 1990s. Those old ones from the 50s look really good. Vibrant colors.