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On Feb 29, 2012, at 4:51 PM, George Brock-Nannestad wrote:

> From: Patent Tactics, George Brock-Nannestad
>
> ...the father-mother-son analogy has a bit more to do with procreation
> than you would think.


Actually, I think about it all the time.  (;


Cheers,
      Andrew






>
>> Pyral may be the inventor of the nitrocellulose lacquer alu disc,
>> used for transcription, instantaneous playback, and parts
>> grandmothering (since the matrix is, technically, the "father").   In
>> any event, the ones made, today, by Apollo Masters (both their own
>> recipe blanks and those of the Transco brand, which they also now
>> make) are n-c lacquer on alu.
>>
>> As far as danger, this should be treated with the same care one would
>> treat fingernail polish (don't add acetone) - but the cut-away swarf
>> - or "chip" - which is stringy, and dry, is the kindling kind of
>> substance which behaves not unlike its brother - magician's flash  
>> paper.
>>
>> It's certainly more fun to say that one is going to cut an
>> "acetate."    To say, "...cut a dub," sounds like one is going to
>> emulate King Tubby. since the same word, Dub, implies a musical  
>> genre.
>>
>>
>>
>> - Andrew
>>
>>
>>
>> On Feb 29, 2012, at 1:01 PM, Steve Greene wrote:
>>
>>> I think acetate was used "in parallel" mainly as an office dictation
>>> format, I've seen "Memovox" discs, Edison Voicewriter and Gray
>>> Audograph
>>> discs in our collections.  All are very thin, the Memovox discs
>>> tend to
>>> be warped and brittle.  Based on the "sample" I have access to,
>>> lacquer
>>> discs took over in the mid 1930's, replacing solid metal discs of
>>> aluminum or zinc, or solid shellac discs.  Shellac continued to be
>>> used
>>> for commercial pressings and some transcription discs through the
>>> 1950's, where it was replaced by vinyl.
>>>
>>> I too am under the impression that the lacquer used on laminated  
>>> discs
>>> was cellulose nitrate.
>>>
>>>
>>>
>>>
>>>
>>> Steve Greene
>>> Archivist
>>> Office of Presidential Libraries
>>> National Archives and Records Administration
>>> (301) 837-1772
>>>>>> Andrew Hamilton <[log in to unmask]> 2/29/2012 11:59 AM >>>
>>> I thought it was the other way around.   Acetate was replaced by
>>> nitrocellulose lacquer, but the name, acetate, lives on...
>>>
>>>
>>> From Wackypedia:
>>>
>>> "Despite their name, most acetate discs do not contain any acetate.
>>> Instead, most are an aluminum disc with a coating of nitrocellulose
>>> lacquer."
>>>
>>> Lacquer masters and dubs remain highly flammable - especially after
>>> near-vaporization by a heated stylus.   The swarf must be removed
>>> carefully from the chip jar (which also has some water in its
>>> bottom).    Then you take a huge clump outdoors and ignite it -  
>>> using
>>>
>>> a 10 foot match.    Weeeeeeeee!
>>>
>>>
>>>
>>> Andrew
>>>
>>>
>>> (P.S., I visited the DDR in 1983.   Beautiful to see no
>>> advertisements or other vestige of decadent capitalism.   Sigh.)
>>>
>>>
>>> On Feb 29, 2012, at 9:53 AM, Dennis Rooney wrote:
>>>
>>>> Although the first instantaneous blanks were cellulose nitrate, the
>>>
>>>> formula
>>>> was later changed to cellulose acetate, hence the use of "acetate"
>>>> as a
>>>> cognomen for discs which are properly called "lacquer(s)". The
>>>> change was
>>>> prompted by some unfortunate accidents involving mastering
>>>> engineers who
>>>> smoked while cutting lacquers. The vast majority of surviving
>>>> lacquer discs
>>>> are cellulose acetate. No worries (at least not about
>>> combustibility).
>>>>
>>>> DDR
>>>>
>>>>
>>>>
>>>> On Wed, Feb 29, 2012 at 9:20 AM, Steve Greene
>>>> <[log in to unmask]> wrote:
>>>>
>>>>> Hello,
>>>>> First time poster here.  How big a concern is the storage of
>>>>> transcription
>>>>> recordings, a majority of which are made of coated cellulose
>>> nitrate
>>>>> lacquer? Coming from a moving image background, the "n" word
>>>>> (NITRATE) is
>>>>> scary, though presumably the volume of nitrate in even a large
>>>>> collection
>>>>> of coated discs is tiny compared to even a small collection of
>>>>> nitrate
>>>>> film.  Were there components in the "recipe" for nitrate lacquer
>>> that
>>>>> tended to make them less combustible?
>>>>>
>>>>> Thanks in advance for your advice, perspectives.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Steve Greene
>>>>> Archivist
>>>>> Office of Presidential Libraries
>>>>> National Archives and Records Administration
>>>>> (301) 837-1772
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Dennis D. Rooney
>>>> 303 W. 66th Street, 9HE
>>>> New York, NY 10023
>>>> 212.874.9626
>>>
>>> Serif Sound  CD Premastering
>>>  Dingbat Lacquer Sound Disc
>>> Andrew Hamilton, clerk
>>> 1 (513) 542-3555
>>> www.serifsound.com
>>
>> Serif Sound  CD Premastering
>>  Dingbat Lacquer Sound Disc
>> Andrew Hamilton, clerk
>> 1 (513) 542-3555
>> www.serifsound.com

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