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Aerogel Yellowing

We have noticed some yellowing in some select tiles of our Aerogel inventory. This could be due to Aging, Radiation Damage, Water (could tie into hydrophobic properties), or perhaps fine particulates in the air. In any case, detailed chemical analysis will be conducted by Dr. Marek Brandys of VSL. I delivered the samples (1.01, yellow 1.03, "good" 1.03) to Dr. Brandys on 6/27. Will post his results A.S.A.P.

Here is a picture that shows the yellowing.