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Coating Interior of Long Glass Tube

thread116-311435

Coating Interior of Long Glass Tube

Coating Interior of Long Glass Tube

(OP)
I need to apply an ultra-thin layer of aqueous solution evenly to the inside of a 2 meter long glass tube to form an optical coating (as the water evaporates, leaving the dissolved product deposited). I have had difficulty finding an economical system. Any suggestions?

 

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