Re: [ARSCLIST] scotch 227

[David Lennick <dlennick@xxxxxxxxxxxx>]

One thing I'd add to this (which is interesting..I'd never seen anything 
about allowing them to
cool for 12 hours) is that plastic reels manufactured by 3M or Ampex (or 
other major
brands) may be safe, but I'd be wary of putting generic reels in for that 
long. And we're all
familiar with those 4-spoke or curved window reels many studios bought in 
bulk and which
were also used for white-box tape.

dl

Goran Finnberg wrote:

 Steve Smolian:

 > As to your squeal, I suggest baking 1 mil
 > longer than 1.5 mil of the same stock.

 I agree about that.

 For really stubborn cases 24 hours at 130°F and then let cool at least
 12 hours or at least overnight.

 William Lund of 3M technical staff wrote:

 --------------------------------------------------

 Subject:[AMPEX] Re: ampex-digest V7 #328 - Baking Tapes
 Date:Sat, 18 Sep 2004 16:51:51 -0500
 From:"William F. Lund" <wflund@xxxxxxx>
 Reply-To:ampex@xxxxxxxxxxxxx
 Organization:Digital on Location
 To:ampex@xxxxxxxxxxxxx

 To all:

 To say again what I have mentioned several times over the past couple of
 years. Baking tape is a process whereby you bring one of the chemical
 components of the magnetic dispersion up to a high enough temperature to
 cause it to melt and slowly soak back into the dispersion (magnetic
 coating) where it will tend to remain for quite sometime. It probably
 wont help much to put it into a bag with desiccant. If you heat the tape
 to about 130 degrees and leave it there for about 12 hours and (most
 importantly) allow it to return to room temperature VERY slowly (about
 another 12 hours) you will find that the tape will remain playable for
 years to come. In fact, little difference (if any) will be noticed
 between baked and new tape.

 The key is to NOT be in a hurry. Do not be afraid to leave the tapes in
 the oven for 12 hours or more and do not be in a hurry to bring them to
 room temperature. Allow at least 24 hours for the entire process, you
 will be glad you did.

 3M tapes of the 226 family (226,227,806,807,808,809) responded perfectly
 to this process, none of the others ever exhibited sticky shed. The
 other thing to remember is if you hurry the process and they become
 sticky again, you didn't a)get them to a high enough temperature,
 b)didn't leave them in there long enough or c)tried to do the process
 too quickly.

 Remember, plastic reels will hold their shapes until about 160 degrees
 F, metal reels are never a problem.

 Good Luck

 Bill
 3M tech service (ret)

 -------------------

 --
 Best regards,

 Goran Finnberg
 The Mastering Room AB
 Goteborg
 Sweden

 E-mail: mastering@xxxxxxxxx

 Learn from the mistakes of others, you can never live long enough to
 make them all yourself.    -   John Luther