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Thanks Tom but we believe this to be more than sticky shed as we have baked some for 8 hours and yes that does fix 99percent of the tape on the spool but there is no change at the leader crossover. Perhaps we should try 24 hours as suggested!  We have had to bake some tapes for many, many hours before yet found a small increase of temp is more effective than a large increase of time for tapes that don't respond to normal procedure!Alex.
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-----Original Message-----

From: [log in to unmask]
Sent: Thu, 17 Dec 2009 22:53:11
To: [log in to unmask]
Subject: Re: [ARSCLIST] Tape Shed-Sticking & stripping


Hi Marie:

Even with quarter-inch reels? I thought the 24 hours and even 12 hours was for 2-inch reels, the 
theory being it takes longer to bake out the center of the tape pack??

The last time I had to bake reels, I think 2 years ago, it was 456 quarter-inch. I did  the 8-8 hour 
cycle and didn't get any residue. But soon before that, I had two reels of Scotch 227 (1-mil) that 
required 12 and 12 hours (they were still sticky at 8 and 8).

-- Tom Fine

----- Original Message ----- 
From: "Marie O'Connell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 17, 2009 5:47 PM
Subject: Re: [ARSCLIST] Tape Shed-Sticking & stripping


> Pretty much my minimum baking time now is 24 hours at the very least and in
> some cases the longer the better.
>
> Cheers
> Marie
>
> On Fri, Dec 18, 2009 at 11:43 AM, Tom Fine <[log in to unmask]>wrote:
>
>> You need to bake ALL reels of 406 from this timeframe. What's always worked
>> for me with 406 is bake for 8 hours, let cool for 8 hours, play as soon
>> after that as you can. I've had to go longer with 407.
>>
>> -- Tom Fine
>>
>> ----- Original Message ----- From: "Alex Tomlin" <
>> [log in to unmask]>
>>
>> To: <[log in to unmask]>
>> Sent: Thursday, December 17, 2009 5:08 PM
>>
>> Subject: Re: [ARSCLIST] Tape Shed-Sticking & stripping
>>
>>
>> Hi all,
>>
>>
>>
>> We also have a few Ampex 406 1/4" 10.5" stereo tapes professionally
>> recorded and stored in London around 77-80 that are suffering binder
>> adhesion to leader tape.  I'd be interested in hearing comments and
>> suggestions as to handling this problem.
>>
>>
>>
>> Obviously the tapes require baking yet the main problem is the oxide
>> sticking to the leader tape edited in between tracks.  There are a few types
>> of leader tape and have found that coloured and printed leader tape is the
>> most problematic.
>>
>>
>>
>> We have very gently hand wound tapes whilst dousing the problem areas with
>> isopropyl prior to any baking, but the oxide still sticks to the leader.  We
>> have also tried baking as well as dehydrating to no benefit.
>>
>>
>>
>> Does anyone have experience of this problem with Ampex 406?  Will soaking
>> in silica gel in the fridge be of benefit?
>>
>>
>>
>> So far there hasn't been any splicing-tape adhesive bleed which is another
>> problem we're having with EMI Tape.
>>
>>
>>
>> Over the weekend I will attempt to post a link to photos of the tapes for
>> everyone.
>>
>>
>>
>> Many thanks,
>>
>> alex.
>>
>>
>>
>>
>> Alex Tomlin
>>
>>
>>
>>
>> Senior Engineer
>>
>>
>>
>>
>> Direct Line: 020 7400 8569
>>
>>
>>
>>
>> Mobile: 07788 438 291
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Audio Transfers  .  Inflight Productions  .  15 Stukeley Street  .  London
>>  .  WC2B 5LT
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> * Audio Transfers is a division of the Inflight Group of Companies and
>> specialise in Digitisation, Format / File Conversions, Archiving, Compiling
>> / Pre-Mastering and Audio Library Administration for the Music Industry *
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List [mailto:
>> [log in to unmask]] On Behalf Of Richard L. Hess
>> Sent: 15 December 2009 20:17
>> To: [log in to unmask]
>> Subject: Re: [ARSCLIST] Tape Shed-Sticking & stripping
>>
>>
>>
>> Hi, Martin,
>>
>>
>>
>> This is very problematic, and I do NOT think baking is a good idea.
>>
>>
>>
>> There is a CHANCE that month-long cold soak in a desiccated
>>
>> atmosphere (silica gel inside double freezer (or foil) Zip-Loc bags
>>
>> in the fridge (not freezer)).
>>
>>
>>
>> It has worked for some 3M 176 that showed this symptom. It has also
>>
>> not worked for other tapes. Jim Wheeler gave me this technique. I
>>
>> don't know his source. I haven't used it much.
>>
>>
>>
>> The other thing to try is VERY slow unwinding - 1.88 in/s or slower.
>>
>> Sometimes that alone helps.
>>
>>
>>
>> The tape in the photo was baked based on a consensus of the people at
>>
>> the seminar (including the tape owner) because we didn't have time
>>
>> for cold soak and we wanted to see what would work (or not).
>>
>>
>>
>> Since that article, I have had good results with 3M201 which had the
>>
>> same problem and the 1.88 in/s wind-through solved it.
>>
>>
>>
>> Good luck!
>>
>>
>>
>> Cheers,
>>
>>
>>
>> Richard
>>
>>
>>
>> At 12:34 PM 2009-12-15, Martin Fisher wrote:
>>
>> Got a polyester/plastic non-backcoated reel in which the binder is
>>>
>>
>> stripping off onto the adjacent wind.  AKA "binder adhesion to back
>>>
>>
>> of next layer" on Richard Hess' site.
>>>
>>
>>
>>>
>>
>>> http://richardhess.com/notes/2006/05/26/binder-adhesion-to-back-of-next-layer/
>>>
>>
>>
>>>
>> Might baking be a solution for this?
>>>
>>
>>
>>>
>> Martin
>>>
>>
>>
>>
>> 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.
>>
>>
>>
>>
>>
>>
>>
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> 




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