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Re: [ARSCLIST] Proper way to store 78s
From: Patent Tactics, George Brock-Nannestad
Yingfen asked and a few replied, however there are a few more things to
consider; vertical is not always good and horizontal is not always bad.
> The reason why I asked is because I have heard that if stored vertically
> exposed to sunlight for too long, the 78s may peel off like onion.
----- this seems to refer to lacquer records (often but mistakenly called
"acetates". All records should be kept in the dark, so we will exclude light
from the discussion. But lacquer records are different to shellac records
(also, but not as mistakenly called "78s") in the way they are made. Lacquer
records have a core and an outer layer of a nitrocellulose lacquer. Usually
the outer layer goes all around the edge, so that there is a continuous layer
of lacquer from side to the other, really only broken near the center hole on
either side. When a lacquer record is stored vertically, its full weight is
supported at the point where the circular disc touches the flat shelf, and
that creates a stress in the lacquer layer. As it becomes more brittle (with
consequent internal shrinkage tension) a crack is more likely to start at a
place with high mechanical stress. Also, if the layer has already begun to
lose adhesion to the core (peeling), both sides have a risk of losing flakes
to the bottom of the record cover. For this reason, horizontal storage is
preferential, because of less stress and because at least one surface (the
top one of the record) will remain in place.
> Also, the
> old record storage cabinets were designed for about 10 78s to be placed
> horizontally in one drawer (it would be bad for the 78s if over 10 are
> stacked horizontally together). For example:
----- any 78 (shellac) storage, vertical or horizontal, is only relevant if
the discs are absolutely flat. Horizontal storage to a pile that it
comfortable to grip and carry with two hands is quite safe, but it requires
drawers as you say. If vertically stored records are not held together with
some pressure the records may warp.
----- in case of flooding, horizontal storage in a pile is preferential,
because then the water only affects the bottom part of the pile, whereas if
it is a shelf, the lower part of the full width of the shelf will be
affected. With flooding 10 cm (4") above the bottom of the shelf 2 meters (6
ft 8") long it would mean affecting 600 records, rather than the bottom 30
records in each pile. We shall disregard capillary action in the covers.
----- at a low temperature, such as 18 degrees Celsius, even a pile one meter
(3 ft 4") high is not detrimental to shellac records. 25 years ago I had two
"reject" piles of 10" records sitting like that for more than 5 years, and
without covers! The only condition was that the records were dusted free of
grit before the piling. Those were my collecting days, where I could not bear
to destroy the "insignificant" records just so that I could recycle the
covers for "better" records. It turned out that the "insignificance" was
merely a symptom of my lack of knowledge--when revisiting the piles some 7
years later I found what amount to great rarities among them. I had simply
interpreted the label information wrongly.
----- I would be very interested in hearing more about the reversed
impression of record numbers cited by Steven Barr:
"In fact, one can
occasionally run across 78's which have reversed record numbers
(raised on the disc on top) permanently impressed in them!",
-- because that would imply that only one of the records had appreciably
softened under stress (and elevated temperature?). I would love to see an
example of this.
So, after another lengthy response,
> On 2009/6/20 5:00 PM, "Marie O'Connell" <azile50@xxxxxxxxx> wrote:
> > Upright, vertically is the correct way
> > Cheers
> > Marie
> > On Sat, Jun 20, 2009 at 8:36 PM, Ying-fen Wang <nanguanl@xxxxxxxxxx>
> >> Dear List,
> >> I wonder if any of you can advise me on the proper way to store 78s.
> >> it be stored upright or horizontally?
> >> Best, Ying-fen