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.
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
> 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,
> discs took over in the mid 1930's, replacing solid metal discs of
> aluminum or zinc, or solid shellac discs. Shellac continued to be
> 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
> 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 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!
> (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
>> 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
>> On Wed, Feb 29, 2012 at 9:20 AM, Steve Greene
>> <[log in to unmask]> wrote:
>>> First time poster here. How big a concern is the storage of
>>> recordings, a majority of which are made of coated cellulose
>>> lacquer? Coming from a moving image background, the "n" word
>>> (NITRATE) is
>>> scary, though presumably the volume of nitrate in even a large
>>> of coated discs is tiny compared to even a small collection of
>>> film. Were there components in the "recipe" for nitrate lacquer
>>> tended to make them less combustible?
>>> Thanks in advance for your advice, perspectives.
>>> Steve Greene
>>> Office of Presidential Libraries
>>> National Archives and Records Administration
>>> (301) 837-1772
>> Dennis D. Rooney
>> 303 W. 66th Street, 9HE
>> New York, NY 10023
> Serif Sound ♬ CD Premastering
> ➣ Dingbat Lacquer Sound Disc
> Andrew Hamilton, clerk
> 1 (513) 542-3555
Serif Sound ♬ CD Premastering
➣ Dingbat Lacquer Sound Disc
Andrew Hamilton, clerk
1 (513) 542-3555