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ARSCLIB  September 2016

ARSCLIB September 2016

Subject:

Re: Testing PVA & Rubber Cement on a Lacquer Disc

From:

Nathan Coy <[log in to unmask]>

Reply-To:

ARSC Library and Archives Discussion List <[log in to unmask]>

Date:

Wed, 14 Sep 2016 17:35:15 -0700

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (99 lines)

I am curious on the necessity of re-attaching the label. The primary
scenario I can think of is if disc is going on display, but even then a
different disc most likely could be chosen and may be a better choice if a
disc is particularly rare. In face I can even think of many wonderful ways
of displaying a separated label along with a disc. It seems that putting
the label in an acid free or buffered envelope to be stored in the disc
storage vessel (whatever that may be) would be more than adequate since the
label does not need to be attached to play back a disc or transcribe the
information from the label. This would avoid subjecting the label and disc
to potential irreversible actions or damage. If a label is partially coming
off it seems it could be temporarily flattened with a small weight or
stabilizer for playback. With proper storage it would be secure post
playback. This would avoid subjecting the label and disc to any undue
damage or manipulation. Removing the label however could be useful if it
was applied over the inner grooves. That is an entirely different scenario
however and would require a different process and discussion. There are
many scenarios where one might need to make informed decisions brought
about through a literature survey, experience with materials, and carefully
designed testing. I'm not convinced this specific is one of those
instances, perhaps consulting an objects conservator that has experience
with these adhesives is a good approach in this case.

pH neutral PVA is reversible, but that doesn't mean it is necessary for any
aspect of interaction with a disc of this nature. Paste would be another
possibility not mentioned that may be a better selection in that it is most
likely more easily reversed, but yet again I'm not really sure it is useful
and it would introduce a significant amount of moisture unnecessarily. In
all cases reversing any process is putting a process in motion that isn't
necessary in this case.

In fact I consulted an object conservator on this topic and was told PVA
would most likely require a solvent that may cause damage to the materials
to reverse and that rubber cement will fail after a short time span and
potentially stain the label paper, both scenarios that are worse than well
designed storage.

AIC has a nice directory of materials conservators that could be consulted
on areas of expertise that exist but are slightly beyond our everyday
practices. It's worth asking people from other fields occasionally.

In our case object conservators would most likely be the best choice.

<goog_1638020811>
http://www.conservation-us.org/membership/find-a-conservator#.V9nqVpMrJE4


I think this is an area that is could be well informed by the practice and
philosophy of conservators


http://www.conservation-us.org/docs/default-source/governanc
e/code-of-ethics-and-guidelines-for-practice.pdf?sfvrsn=9

"VI. The conservation professional must strive to select methods and
materials that, to the best of current knowledge, do not adversely affect
cultural property or its future examination, scientific investigation,
treatment, or function."


It's worth jumping outside the community of practice on these. It's
remarkable the amount of work that has been done and published on materials
conservation. This one comes to mind off hand:
https://www.worldcat.org/title/paper-and-water-a-guide-for-conservators/oclc/716844327&referer=brief_results

Best,

Nathan





On Wed, Sep 14, 2016 at 3:50 PM, Corey Bailey <[log in to unmask]>
wrote:

> Hi All,
>
> Last June, there was a discussion about re-applying a label to a lacquer
> disc. The discussion ultimately revolved around using two types of cement:
> PVA or Rubber Cement. A few people commented that rubber cement may cause
> damage to a lacquer coated disc. Having used rubber cement successfully for
> this purpose, I was curious if the cement would indeed damage a lacquer
> disc so conducted my own test, comparing PVA to the type of rubber cement
> that I have used. The results, along with some photos can be viewed here:
>
> _https://www.dropbox.com/sh/cvsiiigtr63mb05/AACvw_hgSeJjIDNz
> qr0EaZzaa?dl=0_
>
> I'll leave the link up for a week or so. I am cross posting this to both
> lists so that all members can view the results if interested.
>
> Cheers!
>
> Corey
>
> Corey Bailey Audio Engineering
> www.baileyzone.net
>

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