Bleaching and redevelopment

The following appeared on ARCHIVES and is reposted here without the
author's knowledge or consent

    Date: 30 Jul 91
    From: Michael McCormick <ah670 [at] CLEVELAND__FREENET__EDU>
    Sender: Archives & Archivists list <ARCHIVES [at] INDYCMS__BITNET>
    Subject: Bleach and redevelopment in photo conservation

    While going through the Photographer's Formulary catalog, I ran,
    again, across an ad for Restor, a bleach and redevelopment solution
    for faded photographs.
    
    I know the prevailing wisdom is to avoid the usage of such
    treatment, based upon the principle of reversability, and the
    unknown effects of the treatment across the long term.
    
    However, it occurred to me that I do not know, with certainty, that
    any research upon those effects has been done.  Does anyone know if
    Image Permanence Institute, or another lab, has performed any
    accelerated testing upon such a restored item?
    
    If not, it could be an interesting, and potentially useful, bit of
    work.

    Michael McCormick
    Western Reserve Historical Society

 
 

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                  Conservation DistList Instance 5:12
                  Distributed: Tuesday, July 30, 1991
                        Message Id: cdl-5-12-004
                                  ***