by Tim Padfield, Martin Burke and David Erhardt


A cool display case was made for a vellum document, George Washington's commission. A close fitting airtight container was used. This maintained a nearly constant relative humidity on cooling, but care was needed to minimise temperature gradients. Thermoelectric coolers were used. The showcase performed satisfactorily for one year with no change in its internal moisture content.

A brief summary of the showcase design (650Kb) was first published as: Tim Padfield, 'A cooled display case', Museum 146 (1985) 102-103. A more complete description (400Kb) was published as: Tim Padfield, Martin Burke and David Erhardt, 'A cooled display case for George Washington's Commission', ICOM Conservation Committee, Copenhagen Conference 1984, 84.17.38-42.


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