[QuadList] Video Tape Baking

[DCFWTX at aol.com]

Chris,

John pretty much parallels my findings and procedures over the years. The 
duration really varies from stock to stock. We know from experience that 
Ampex 2" quad stock generally speaking is a long duration baking procedure. 
Memorex Chroma 90 to a slightly lesser extent. 3M 400 is all over the map 
depending on when it was manufactured.  Some of the 3M 1" is now also experiencing 
this problem.

David Crosthwait

DC Video 
Archived Media Transfer & Re-mastering Services
177 West Magnolia Blvd.
Burbank, CA. 91502
818-563-1073
818-563-1177 (fax)
818-285-9942 (cell)
DCFWTX at AOL.COM     
DAVID at DCVIDEO.COM
WWW.DCVIDEO.COM




In a message dated 2/1/2010 6:55:19 AM Pacific Standard Time, 
jwalko at scenesavers.com writes:

> Chris:
> 
> You’ll probably get different answers talking to different people.
> 
>  
> 
> We’ve found that longer (to a certain extent) is better…especially for 
> larger (i.e. Quad) formats.  We typically process for as much as 36 hours…but 
> I’ve heard others using shorter times.  I spoke to an audio engineer who “
> bakes” audio tapes and he only processes them for 4 hours.
> 
>   
> 
> A couple of notes…baking is not done as a matter of course.  Other 
> solutions are attempted first, such as cleaning and storing in a cool, dry 
> environment for an extended period (maybe 2 or more weeks).  The idea is to remove 
> as much as the humidity/moisture from the tape without over drying it (a 
> certain amount of moisture is required in the tape for it to be playable…for 
> the lubricant in the tape to work, etc.).  As a side note…there is another 
> thread going on another list server that is discussing freezing magnetic 
> media.  I’ve not read these too closely, but from what I understand, 
> magnetic media should never, ever be frozen.  I think the IPI may have even done a 
> study about this and found that tapes that were frozen couldn’t be 
> recovered…I’ll have to see if I can find that article (I may be remembering this 
> wrong…).
> 
>   
> 
> Regarding ovens…I’ve heard of people home building solutions using 
> Coleman coolers, a 100 watt light bulb and a thermostat.  The person who built 
> this told me he is able to maintain a steady temperature within 3 degrees.  
> Any industrial oven capable of holding a steady, low temperature would work…
> but, it must be capable of relatively low temperatures…in the 115-130 
> degree range…standard ovens, as previously mentioned, won’t work.
> 
>   
> 
>  
> 
> John Walko
> 
>  Media Archive Manager
> 
>  Scene Savers
> 
>  www.scenesavers.com
> 
>  800-978-3445
> 
>   
> 
> From: quadlist-bounces at quadvideotapegroup.com 
> [mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Chill315 at aol.com
> Sent: Monday, February 01, 2010 9:44 AM
> To: quadlist at quadvideotapegroup.com
> Subject: Re: [QuadList] Video Tape Baking
> 
> 
> 
>   
> 
> I do not do any restoration and do not have access to a quad.  But I 
> wanted to understand the procedure.  
> 
> 
>  
> 
> 
> So did you make a special oven type device?  How long does it take?
> 
> 
>   
> 
> 
> Chris Hill
> 
> 
>  WA8IGN
> 
> 
>  
> 
> _________
> 
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