On 1/14/2012 9:40 PM, Ed Huntress wrote:
On Sat, 14 Jan 2012 22:34:41 -0500, Joseph Gwinn
wrote:

In ,
"Jim wrote:

"Paul K. wrote in message
...

"Joseph wrote in message
It is not breakage. The strongly alkaline automatic dishwashing detergent
will etch the surface and they will loose their shine. It will etch
regular glass to, just not as fast.

From wikipedia
Lead crystal should not be cleaned in a dishwasher as the corrosive effect
of dishwasher detergent is high on such types of glass-that is, it will
quickly go 'cloudy'.
http://en.wikipedia.org/wiki/Dishwasher

Paul K. Dickman

I've seen KOH in boiling ethanol etch Pyrex cloudy in a few minutes.

That's pretty severe, but ordinary dishwashing isn't nearly that
extreme. We use the lead crystal wine glasses two or three times a week
so those glasses have been washed at least a hundred times over the last
year, for a few years, and they do not appear to be etched. I'm sure
they will eventually dull, but it won't be fast. And, I'll surely
break them by accident long before.

Joe Gwinn

One advantage of agin that I've noticed is that, as my eyes
deteriorate, the glasses coming out of the dishwasher look a lot
better than they used to. d8-)



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