Kevin O'Brien (kob@paradise.net.nz)
Thu, 11 Mar 1999 08:21:58 +1300
Hi Dick,
Pd/Pt can be no substitute for the deep,Van Dyke, brown that iron-silver
produces. It has a special quality that the iron imparts like Hooker's green
or Prussian blue. As a painter no substitutes are acceptable.
Pd/Pt is a beatiful process with its own character and I want both.
Presumably the nitric gasses are the brownish oxides of nitrogen. Is the
process still too hazardous with a fume cupboard or out of doors ? I respect
your sensible caution but I am well used to working carefully with strong
reagents.
Kevin O'Brien
>Silver nitrate is not easy to make. The formula is pretty simple but you
>are dealing with a fast oxidizing reaction that can easily get our of
>control. It also produces a mixture of nitric gasses which are deadly in
>small quantities. If it don't kill you, you may luck out with a just bad
>case of emphysema. If this is not enough warning, let me say that I used to
>make it, and I made a tidy profit making it, but after a couple of
>incidents, I now no longer make it myself. No one on the list has ever
>accused me of being a scardy cat, quite the opposite.
>
>It ain't worth it. Skip the silver stuff and go pt/pd, it's cheaper than a
>new pair of lungs.
>
>--Dick Sullivan
>
>
>
>
>At 07:28 PM 3/10/99 +1300, you wrote:
>>I have major difficulty getting silver nitrate because of bureacratic
>>restrictions on general sales of chemicals. The cost too is way over the
>>top.
>>
>>How do I make it easily ? I can get nitric, sulphuric, hydrochloric acids
>>and sod hydroxide readily and I expect silver metal. My basic chemistry's
a
>>bit rusty but I still remember the basic of filtration & titration etc..
>>
>>As Ware suggests silver oxide is there a quick route to prepare that other
>>than going through the nitrate ?
>>
>>Kevin O'Brien
>>(Where our sheep have infiltrated the bureacrazies)
>>
>
>
>
>505-474-0890 FAX 505-474-2857
><http://www.bostick-sullivan.com>http://www.bostick-sullivan.com
>http://www.workingpictures.com
>
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