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Unusual deposit in tube (valve)
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28th Nov 2017, 1:26 pm
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Boater Sam
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Location: Middlewich, Cheshire, UK. & Winter in the Philippines.
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Re: Unusual deposit in tube (valve)
Overheating of soda glass in the blowing/moulding process can be the cause. Normally re-annealing would remove the whiteness.
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