Thanks David - this really helps out!
On Tue, Aug 26, 2008 at 4:43 PM, David Harvey <[log in to unmask]> wrote:
> Hi Karen,
> Usually metals and other inorganics are more stable in direct light but here
> are some issues to consider.
> Most historic trophies and medals and building hardware are lacquered.
> Sunlight and heat affect lacquers and other coatings and so you may find
> those breaking down and greatly accelerated tarnish staring in exposed areas
> of loss. Heat increases chemical reactions, including corrosion, so keep
> your eyes open for any signs of color change or any white or green powdery
> deposits. Heat also expands metals, especially if it is fairly thin gauge,
> so you could have one side expanding and then cooling cyclically with the
> diurnal cycle - and this may stress solder and rivet joins. And finally if
> there are other materials such as ivory, wood, textiles, plastic, etc. then
> light is definitely a major concern.
> Cheers!
> Dave
> David Harvey
> Conservator
> Los Angeles, CA
>
> On Tue, Aug 26, 2008 at 1:27 PM, Karen Eckhaus <[log in to unmask]>
> wrote:
>>
>> I'm throwing this out to the list, because metals is not my strongest
>> area.
>>
>> We have a trophy that we're displaying in a window. It silver and I
>> was wondering if there is any effect from long-term direct sunlight
>> exposure (it's a South facing window). Does anyone know?
>>
>> Thanks for your help!
>>
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--
karen eckhaus
574 9th avenue, apt 1
new york, new york 10036
646.429.9180
917.756.6244
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