Any theories as to why baking times are increasing?

Also, are you finding you need the longer baking times for re-bakes as well as first-time bakes?

-- Tom Fine

----- Original Message -----
From: "Marie O'Connell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, April 01, 2013 3:38 PM
Subject: Re: [ARSCLIST] Sticky SHRED


Hi Shai

No, I don't find it alarming at all. I have been baking for longer periods
now for a few years as 8 hours just wasn't enough and I had to keep putting
the reel back in the oven.

Cheers
Marie


On Tue, Apr 2, 2013 at 9:32 AM, Shai Drori <[log in to unmask]> wrote:

> Hi Marie
> Do you find this as alarming as I have that baking times have risen so
> high in the last few years? My record was set last year with Ampex 480
> quarter inch 2500' tapes needing 5 days to be playable. Really slowed down
> operations.
> Cheers
> Shai
> בתאריך 01/04/13 9:15 PM, ציטוט Marie O'Connell:
>
>> I agree with Richard. I have seen quite a bit of this recently with Ampex
>> 456. And it does make a real mess. I am also finding BASF and AGFA doing
>> this too. They all appear to be slightly too wide for the tape path.
>>
>> I have been baking for much longer periods also, 3 days would be normal
>> for
>> me now.
>>
>> Good luck.
>>
>> Marie
>>
>>
>> On Tue, Apr 2, 2013 at 5:40 AM, Richard L. Hess <[log in to unmask]
>> >**wrote:
>>
>> Hi, Curtis,
>>>
>>> I've been baking longer, but edge shedding as you describe is common if
>>> the tape is slit a bit wide (hard to measure, but that is why the event
>>> is
>>> so random--it might be one reel out of a jumbo roll where the slitting
>>> blades were mis-adjusted).
>>>
>>> I don't think 24 hours (my norm these days) would show a difference as I
>>> saw this off some 1/2-inch 456 just recently, but it was only the edge.
>>>
>>> It is frightening, but I'd just vacuum up the little hairs and be done
>>> with it. Remember, those are about a mil wide and you're dealing with
>>> nominally 82-mil (minimum spec'd is 75 mil from Ampex) track width that
>>> doesn't even go completely to the edge, so you probably don't have any
>>> sound on the little hairs. (I did want to write "hares" in honour of the
>>> season. <smile>)
>>>
>>> I would check for debris in the corners of the guides (where the face
>>> meets the top and bottom caps) which can exacerbate this hair-shred but,
>>> overall, if it's coming just from the edges, I think you're safe.
>>>
>>> I see 456 doing this more (though I've seen it more on 1/2-inch than
>>> 1/4-inch). It has also happened on Agfa and BASF, but not regularly.
>>>
>>> I don't have this variant specifically listed, but you might find this
>>> resource of use:
>>> http://richardhess.com/notes/****formats/magnetic-media/**<http://richardhess.com/notes/**formats/magnetic-media/**>
>>> magnetic-tapes/analog-audio/****degrading-tapes/<http://**
>>> richardhess.com/notes/formats/**magnetic-media/magnetic-tapes/**
>>> analog-audio/degrading-tapes/<http://richardhess.com/notes/formats/magnetic-media/magnetic-tapes/analog-audio/degrading-tapes/>
>>> >
>>>
>>>
>>> Good luck!
>>>
>>> Cheers,
>>>
>>> Richard
>>>
>>>
>>> On 2013-04-01 12:10 PM, Peoples, Curtis wrote:
>>>
>>> Hi Richard,
>>>>
>>>> I believe the tape is Ampex 456, not positive though. The studio
>>>> generally bought Ampex 456 tape. It is a ten inch, quarter inch reel
>>>> (two
>>>> track master recording). For this collection, we bake 8 hours at 130
>>>> degrees. We have found this to be a suitable process for this
>>>> collection.
>>>> The shredding appears to be from the edges. We are transferring on a
>>>> relatively new Otari MX 5050. The machine was cleaned so I don't have
>>>> pics
>>>> of the shred. They are usually about 3 inches long before breaking and
>>>> are
>>>> about the thickness of fine hair.
>>>>
>>>> Best,
>>>>
>>>> Curtis
>>>>
>>>> -----Original Message-----
>>>> From: Association for Recorded Sound Discussion List [mailto:
>>>> [log in to unmask]**GOV <[log in to unmask]>] On Behalf Of
>>>> Richard L. Hess
>>>> Sent: Monday, April 01, 2013 10:48 AM
>>>> To: [log in to unmask]
>>>> Subject: Re: [ARSCLIST] Sticky SHRED
>>>>
>>>> Hi, Curtis,
>>>>
>>>> Please provide specifics as to type of tape, width, reel type, baking
>>>> process and duration.
>>>>
>>>> Also photographs are really useful.
>>>>
>>>> Is the shredding from the edges only or across the entire width of the
>>>> tape?
>>>>
>>>> What is the playback machine?
>>>>
>>>> Cheers,
>>>>
>>>> Richard
>>>>
>>>> On 2013-04-01 10:35 AM, Peoples, Curtis wrote:
>>>>
>>>> Hi Folks,
>>>>>
>>>>> We have a collection of tapes that have sticky shed and we are baking
>>>>> and transferring them. Things are going as planned except for one
>>>>> tape. It
>>>>> is shredding into fine hair like stands. I thought it needed to be
>>>>> baked
>>>>> longer so I baked it a second time. Same problem. I have seen tape shed
>>>>> before and this looks different.
>>>>>
>>>>> Any help identifying the problem is greatly appreciated.
>>>>>
>>>>> Best,
>>>>>
>>>>> Curtis L. Peoples, Ph.D.
>>>>> Associate Archivist, Crossroads Music Archive,
>>>>> www.crossroadsofmusic.ttu.edu<****http://www.**crossroadsofmusic.<http://www.crossroadsofmusic.>
>>>>> **ttu.edu/<h**ttp://www.crossroadsofmusic.**ttu.edu/<http://www.crossroadsofmusic.ttu.edu/>
>>>>> >
>>>>>
>>>>> Unit Head, Crossroads Recording Studio,
>>>>> http://library.ttu.edu/****crossroadsrecordingstudio/<http://library.ttu.edu/**crossroadsrecordingstudio/>
>>>>> <htt**p://library.ttu.edu/**crossroadsrecordingstudio/<http://library.ttu.edu/crossroadsrecordingstudio/>
>>>>> >
>>>>> Director, TTU Americana Ensemble,
>>>>> http://ttuamericanaensemble.****weebly.com/index.html<http://weebly.com/index.html>
>>>>> <http://**ttuamericanaensemble.weebly.**com/index.html<http://ttuamericanaensemble.weebly.com/index.html>
>>>>> >
>>>>>
>>>>>
>>>>> Contact Info:
>>>>> Southwest Collection, Texas Tech University P. O. Box 41041 Lubbock,
>>>>> Texas 79409-1041
>>>>> Email: [log in to unmask]
>>>>> TEL: 806-742-3749 ext. 278
>>>>> FAX: 806-742-0496
>>>>>
>>>>>
>>>>> --
>>> Richard L. Hess email: [log in to unmask]
>>> Aurora, Ontario, Canada 647 479 2800
>>> http://www.richardhess.com/****tape/contact.htm<http://www.richardhess.com/**tape/contact.htm>
>>> <http://www.**richardhess.com/tape/contact.**htm<http://www.richardhess.com/tape/contact.htm>
>>> >
>>>
>>> Quality tape transfers -- even from hard-to-play tapes.
>>>
>>>
> --
> בברכה,
> שי דרורי
> מומחה לשימור והמרה של אודיו וידאו וסרטים 8-35 ממ.
>