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Hi, Shai, Thanks for the kind words. Here is what I said in the ARSC Journal paper >Silicones and siloxanes > >Decamethylcyclopentasiloxane, also known as cyclomethicone and D5, >is a volatile siloxane >that completely evaporates. [Personal communication with Benjamin >Falk, GE Research Chemist, 12 June 2006] It is widely used in >diverse applications including the cosmetic >and personal care industries where it is used to add a slippery feel >to shampoos and creams. >It is also starting to be used as a dry cleaning agent. Applying >this to a squealing cassette >worked, but one Nakamichi Dragon stopped working for a while as the >material penetrated >the mechanism. The D5 was over-applied. One attractive feature in >this regard is that the >Dragon healed itself as the D5 evaporated completely over a few >days. It apparently leaves >no residue and the evaporation time is, of course, related to the >amount used. > >While successful with cassettes when heavily applied, it has had >mixed results with >both 3M 175 and Sony PR-150 in open-reel applications. In both >instances, the tapes do >not play all the way through without returning to squealing. The >problem was made >worse when the environment that the 3M 175 was being transferred in >became warmer >with the advent of summer. > >Silicones that are not volatile seem to work better with 3M 175, but >application methods >still need refinement. These lubricants seem to work best when >over-applied, but that increases >the risk of higher wow and flutter. Perhaps if a fluid is to be >over-applied, the O'Connell alcohol >technique may be a better choice as the alcohol is removed and >evaporates completely. I believe that the GE number is SF12 and the CAS number is 541-02-6 Do a Google search for Decamethylcyclopentasiloxane and you'll find lots more including controversy about its safety, but the first link I get says it's safe http://www.sehsc.com/d5.asp There could be some confusion as "D5" also may be used to refer to Panasonic's standard definition component digital video format that became a SMPTE standard, but, while an excellent format, was not widely adopted. Cheers, Richard At 09:01 AM 2009-12-18, you wrote: >P.S. >Richard great summery, you're top ace. I can't find that chemical >you wrote down as lubricant (the stuff GE is pushing) Can you write it again? >Shai Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX Detailed contact information: http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.