Thread: trident seal
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Old 03-19-2019, 11:36 PM
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John Croucher John Croucher is offline
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Bradley- the original source of Hagy's paper is to be found at Hagy, H.E.
Journal American Ceramic Society Vol 62, [1-2] 60-62 (1979)
The title of the paper is "The Trident Seal-A Rapid and Accurate Expansion Differential Test"
The retardation mismatch is read through the central cane which is your master clear. The outer canes of the seal will be the color you want to compare.
Alfred will have back copies of this journal and the glass engineering dept should have an optical bench with a polarimeter.

Last edited by John Croucher; 03-20-2019 at 01:18 AM.
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