Re: [ARSCLIST] Ampex 456 - tip of the iceberg...chemistry

["Peter@xxxxxxxxxxxxx" <lists@xxxxxxxxxxxxx>]

The AGFA process was not openly published and, unlike the AMPEX process,
people have actually been paying royalties to use it.  Last I heard, from
someone who has used the process, the patent was owned by John Matarazzo
(spelling?) and is currently held by his wife.

Peter Brothers
President
SPECS BROS., LLC
(973)777-5055
www.specsbros.com

Restoration and Disaster Recovery Service Since 1983

> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:ARSCLIST@xxxxxxx]On Behalf Of Goran Finnberg
> Sent: Saturday, June 17, 2006 11:53 AM
> To: ARSCLIST@xxxxxxxxxxxx
> Subject: Re: [ARSCLIST] Ampex 456 - tip of the iceberg...chemistry
>
>
> Steven C. Barr:
>
> > One wonders...if there is moisture involved, and thus present in the
> > "defective" tapes...would it be possible to use a microwave oven
> > (which requires water molecules to create heat) to "bake" the tapes?
>
> It is a fact that the recommended way to treat AGFA 468/469, from those
> batches during a year around 1990, that were found to go sticky, and in
> fact the only AGFA tape to go sticky and only from production during a
> year as far as I know the story...
>
> IS to bake it in a microwave oven according to the AGFA memo issued at
> that time.
>
> This was reported by Dave Collins Chief Mastering Engineer at A&M
> records who reported that he was visited at A&M by a technical
> representative of AGFA GEAVERT GmbH who set it all up and guided David
> Collins through the procedure and left the Technical memo.
>
> I would love to get my hand on a copy of that memo for sure.
>
>
> --
> Best,
>
> Goran Finnberg
> The Mastering Room AB
> Goteborg
> Sweden
>
> E-mail: mastering@xxxxxxxxx
>
> Learn from the mistakes of others, you can never live long enough to
> make them all yourself.    -   John Luther
>
>