Irrisation? Re: re info on old bottle for M.Cotton

Hello, MaNu. . .

I am not familiar with the term "irrisation" nor is it in my (American)
dictionary.  Can you tell us more about this word and how it's used in your
part of the world.

-------Harry Pristis

<><><><><><><><
>"MaNu" <[EMAIL PROTECTED]> wrote in message
>news:[EMAIL PROTECTED]
>> Hello Michael,
>> in my opinion the thick encrusted layer should not be removed. This is
>just
>> the deformation of the glass, so called irrisation, this occurs on bottles
>> that have been burried in the ground or have been exposed to sea water.
>The
>> glass is affected because of a chemical reaction between the salty sea
>water
>> and the minerals in the glass. The irrisation gives the bottle something
>> extra and also has a historic value. It is quite common that this
>irrisation
>> will (can) flake off. You will have to handle the bottle with extreme care
>> and do not expose it to severe temperature changes.
>>
>> All the best,
>> MaNu
>>
>>
>
>Thank you for your reply. I also posted the same query on the
>antique-bottles.net forum and someone there advised me to consult an
>archaeological society for advice. I have since emailed such a society in
>Portsmouth and I am waiting for a reply.
>
>Thank you once again.
>
>-- 
>Michael Cotton