http://www.hornglass.com/englisch/installation.php

http://www.hornglass.com/installation.php

Hope this helps

I think this is correct, as you suggest. I am not sure if this is the same process you mention, but I give it in case it helps

EFFECTS OF ELECTRON BOMBARDMENT ON ELASTICITY AND MECHANICAL DAMPING OF CERTAIN GLASSES
A borosilicate glass and a lead-containing silicate glass were exposed to various dosages of 2 Mev electrons, and the effects on the logarithmic decrement and period of a freely oscillating torsional pendulum in which each was made the torsional member were noted. These effects, in both glasses, are qualitatively described as disannealing. Quantitatively, tan delta was increased 10 to 15% in the berosilicate and 30 to 60% in the lead glass, and the corresponding decreases in rigidity were of the order of 0.4 and 2%, respectively. In both glasses the mechanical effects and the associated brownish color annealed out in about 20 hours at 500 deg F. Resides these effects, there were some completely unexpected effects which are reported for the first time and should be verified by others. These consist of (1) changes in the shape of tan delta vs. temperature curves caused not only by thermal treatment but also by changes in period of the pendulum and (2) fine structure in the tan delta vs. temperature maxima due to sodium ion diffusion. These details complicate the in terpretation of such maxima and, if verified, will justify a re-examination of the anelastic behavior of glasses in general and berosilicate glasses in particular. (auth)
http://www.osti.gov/energycitations/product.biblio.jsp?osti_...

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Note added at 30 mins (2009-02-08 20:13:35 GMT)
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This link refers to disannealing or tempered glass, so that may be another way of saying it:
http://books.google.com/books?id=KpyjNhIEVv4C&pg=PA113&lpg=P...

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Note added at 32 mins (2009-02-08 20:15:37 GMT)
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Hardened glass is made from annealed glass that goes through a thermal tempering process. The glass is put on a roller table that sends it through a furnace. This furnace then heats it to about 1112 degrees Fahrenheit which is just above its annealing point. Then the glass is rapidly cooled with forced draughts of air while the inner portion of the glass remains free to flow for a short period of time.
http://www.do-it-yourself-window-cleaning-tips.com/tempered-...

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Note added at 44 mins (2009-02-08 20:26:59 GMT)
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From what I read over and over again, tempered or annealed glass finishes are removed by the application of acid. It is perfectly correct to call this process disannealing. My only question would be why one would want to do that. I wonder if you could explain the application of this process a little more, please?

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Note added at 10 days (2009-02-19 14:51:41 GMT)
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Thanks for letting us know, hausencla - seems unlikely, doesn't it? But it is nice that you give some feedback; some posters seem to forget to do that.