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Same, I bake in a Contherm scientific oven and have never in 21 years had a
plastic reel warp or melt on me.
Cheers
Marie

On Sat, May 30, 2015 at 5:47 PM, John Chester <[log in to unmask]> wrote:

> On 5/29/15 10:08 PM, Richard L. Hess wrote:
>
>> I just reviewed the wonderful document:
>>
>> ARSC Guide to Audio Preservation
>> http://www.clir.org/pubs/reports/pub164/pub164.pdf
>>
>> On page 60 (PDF 72) it says, "Only bake tapes with metal flanges, as
>> plastic reels may warp."
>>
>> It is true, they MAY warp, but in baking tapes in food dehydrators for
>> over a decade, I may have had ONE plastic reel warp.
>>
>> This is a case of the lesser of many evils.
>>
>> One should not unspool a tape that needs to be baked as the mag coat may
>> be found adhering to the back coat of the next layer.
>>
> 100% agree.  I have seen tapes which were unspooled before baking where
> 50% or more of the oxide layer was stuck to the back coating, and the tape
> was completely ruined.  So don't do that.
>
>> So I would suggest that the risk of having to cut a warped plastic flange
>> is much lower risk than unspooling the unbaked tape.
>>
> I have never seen a plastic reel which was so badly warped by baking that
> I had to cut the reel to remove the tape.  Very occasionally I have chosen
> to replace the reel before returning the tape to storage, but usually the
> reel is completely undamaged.
>
> -- John Chester
>