Cleaning art glass windows

The following is posted on behalf of Sarah Arehart

    Does anyone have experience using Synperonic A7 for cleaning art
    glass windows? It was recently recommended for our historic
    house museum windows by a conservator. I have checked the
    DistList archives, and found some useful information about the
    dilution process, but I haven't found anything on its specific
    use for glass. I understand that it must be heated and added to
    warm water, and then further diluted in order to be used. I
    would be grateful if anyone could give me information about the
    following questions:

    1.  What is the shelf life of the diluted solution? For example,
        can we make up a batch and keep it for a year, or do we have
        to make up a new batch each time we clean?

    2.  Is the solution effective at room temperature after
        dilution? In other words, does it have to be warm to be
        functional?

    3.  We don't have a lab to prepare this solution. Is this safe
        to do in a conventional kitchen or stovetop burner? 4. What
        kind of water is best to use with this solution (distilled,
        etc.)? 5. Will the solution effect the metal caming of the
        windows in a negative way if they come in contact?

    4.  What kind of water would be best to use with this solution
        (distilled, etc.) 5. The technical information sheet says
        that A7 is "very toxic to aquatic organisms." It also says
        "Prevent entry into drains and water courses." Yet later in
        the same document it says "Substantially biodegradable in
        water. Complies with the minimum 80% biodegradability
        requirement of EEC directive 82/242." Does this mean it is
        safe to dispose of the diluted solution down the drain, or
        not?

    I would really appreciate any responses to these questions.
    Thank you very much for your time,

    Sarah Arehart
    Collections and Research Specialist
    Frank Lloyd Wright Preservation Trust
    773-834-5276
    robiehousepreservation [at] robiehouse__org

Susan Lerner
Collections Manager/Registrar
The Frank Lloyd Wright Preservation Trust


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                  Conservation DistList Instance 18:10
                 Distributed: Thursday, August 5, 2004
                       Message Id: cdl-18-10-032
                                  ***