You may wish to explore cleaning methods used for CD and DVD nickel
stampers. Because these have micron-size features, any method safe for them
should be safe for your discs.

Some mastering facilities use reactive ion plasmas, but I believe these are
suitable for removal or organic contaminants. Others may use an ultrasonic
bath with solvents such as trichloroethylene (may not be allowed by OSHA.)

I am not an expert in this area, so suggest that you contact someone who is,
such as a CD and DVD mastering house or replicator.

Jerry Hartke
Media Sciences, Inc.

> -----Original Message-----
> From: Association for Recorded Sound Discussion List
> [mailto:[log in to unmask]] On Behalf Of Gerald Fabris
> Sent: Wednesday, March 23, 2011 12:33 PM
> To: [log in to unmask]
> Subject: Re: [ARSCLIST] Cleaning Metal Masters & Mothers
> 
> Hi Larry-
> 
> I'm grappling with this same issue at the moment - how best to clean
> Edison disc metal parts.  We just contracted a metals conservator to study
> the problem and make recommendations.  She's working on it now.
> 
> The topic came up on ARSClist in September 2005.  If you do a search in
> ARSClist for "metal parts", you'll find the discussion.
> 
> If you contact me off-list, I can send some additional comments that I've
> gathered.
> 
> Thanks,
> Jerry Fabris, Museum Curator
> Thomas Edison National Historical Park
> National Park Service
> United States Department of the Interior
> 211 Main Street
> West Orange, New Jersey 07052
> tel:  (973) 736-0550, ext. 48
> fax: (973) 243-7172