From: Darryl Baird (dbaird@umflint.edu)
Date: 07/29/03-06:50:13 AM Z
Believe me, I'm not considering either approach. I'm very sensitive to
ammonia and the very thought of hydrofluoric acid gives me the shakes.
Darryl
~~~~~~~~~~~
Ole Tjugen wrote:
>The "classic" method is to prepare the glass plate by scrubbing with strong
>ammonia, and then with (strong) nitric acid...
>
>Hydrofluoric acid is one of the nastiest chemicals of all. DO NOT EVEN THINK
>OF IT.
>
>Ole Tjugen
>
>
>
>>===== Original Message From alt-photo-process-l@skyway.usask.ca =====
>>Etching glass
>><Have you thought to etch the glass surface first - say with hydrochloric
>><acid?
>>.......................
>>Please excuse the correction but I think that should be
>> HYDROFLOURIC ACID
>>Which may not be stored in glass bottles but those made of guttapercha. It is
>>a deadly stuff and is used for etching designs on glassware with beeswax as
>>the resist.
>> Take care.
>> John Grocott
>>
>>
>
>
>
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