Re: Care of Rare Valves
This question of "flowing glass" always sparks debate. In the case of valves, if the glass flows then surely we would see the envelopes collapsing (bulging inwards) due to atmospheric pressure, irrespective of orientation, during storage? However, the question of "best practice" for storing valves is a good one.
To the best of my knowledge, there is no one on the forum who is a "professional" conservationist - I'm thinking of someone who works in one of the major museums. I'd guess that in the Science Museum, for example, there must be a department who have a very high degree of expertise, built up over decades and shared with other museums across the world, who deal with many of the kinds of issues that we discuss on the forum. The question of cleaning vintage objects springs to mind. Perhaps we should put out feelers? Just occasionally, I'd guess they could learn from us.
B
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