Re: [ARSCLIST] shellac and acidity

[Malcolm Rockwell <malcolm@xxxxxxxx>]

I've noted the "transfer" you mention, usually with late 1940s / early 1950s
disc formulations and sleeve inks.
But I've never seen damage to a record from an acidic paper sleeve. The sleeve
will either disintegrate (like some of the 10 and 12 record folios sleeves do)
or get so brittle they crumble. But I've seen no damage to the records.
Malcolm R

*******

Kurt Nauck wrote:

> At 01:17 PM 5/23/2003, you wrote:
> >Hello, Alain,
> >
> >There MIGHT be another explanation...
> >
> >Where the paper is in contact with the disc it is pressed tightly to its
> >neighbor. Where there is no disk, the air is free to reach the surface of
> >the paper and exchange, thereby leaching out some of the ink long-term.
> >I've seen this with newspapers, the exposed parts hanging out of a folder
> >are more degraded than the part in the folder.
>
> I also see records bearing an image of the printing on the sleeve. This
> evidently is caused by chemicals in the ink which react with the shellac.
> By the way, never write on a record sleeve with a magic marker - you will
> see the same thing happen.
>
> What I have not seen (as far as I know) is any record obviously affected by
> an acid-laden sleeve. Has anyone else?
>
> Kurt & Diane Nauck