Re: [ATM] Does exposed Pyrex lose polish over time?

["Krajci, Thomas J" <KrajciTJ@state.gov>]

>From: Andy Saulietis <iss@pvtnetworks.net>


>I'd be a bit cautious about putting acid on mirrors..
>I went thru a 6 month re-coating exercise with a 24"
>commercial mirror. The coating only lasted a for weeks before
>deteriorating with parts of it flaking off. Previous
>coatings by the same coater had *no* problems. Several
>unsuccessful efforts later (cleaning, solvents etc) we
>determined that the mirror had been wrapped in newspaper
>when shipped to coaters the first time, the newspaper
>got wet, and leached something (probably acid of some type)
>into the microcracks in the polished surface. 

Microcracks in the polished surface?

Does this mean the polish was incomplete?


Tom Krajci
Tashkent, Uzbekistan


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