I would also try a wide roller machine for this tape like an A80 or an
ATR-100. The small rollers and guides on the mx could be aggravating the
בתאריך 01/04/13 6:40 PM, ציטוט Richard L. Hess:
> 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:
> Good luck!
> 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.
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List
>> [mailto:[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?
>> 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.
>>> Curtis L. Peoples, Ph.D.
>>> Associate Archivist, Crossroads Music Archive,
>>> Unit Head, Crossroads Recording Studio,
>>> Director, TTU Americana Ensemble,
>>> 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
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