Recalcifying purified water

We are designing a new water purification system and intend
including a re-ionization step to raise the pH to at least 8.  I
would be interested to hear how other paper labs have done this
including the following:

    *   what has been used as a calcium source?

    *   how much has been required and in what form e.g. a 30 cu.
        in. column of marble chips of a given size?

    *   how the system is monitored and maintained?

    *   overall how successful was the system?

Lyndsay Knowles
Senior Conservator of Paper
National Gallery of Victoria
Fax: +61 3 9208 0249


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                  Conservation DistList Instance 13:45
                 Distributed: Friday, February 25, 2000
                       Message Id: cdl-13-45-026
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