cheers
-steve
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>Recently I was asked to give some brand names and suppliers of Diazo compounds.
>The following may be outdated as they are 4-5 years old, but maybe it helps:
>
>Product: DIAZO NEGA S 32
>From: PANCHIM, 17, rue des Cerisiers, Zone industr. de l'eglantier, CE 2843
>LISSES, F-91028 Evry Cedex, France, Tel.: 0033-1-6086-2828 Fax -9131.
>
>Product: SIT C
>From: FOTEC AG, Postfach 1123, Eigenheimstr. 22, CH-8700 Kusnacht, Switzerland,
>Tel.: 0041-1-9303000, Fax.: 9104525.
>
>If somebody should try to use diazo compounds: I have no information about the
>concentrations needed, but would like to get informations about any
>experiences.
>I fear the sensitizers are expensive and that with the soft negs or thin
>dilutions required to make that material for line work suitable for contone,
>inconsistant results may be likely to expect.
Although diazos should be less toxic than dichromates, I'd inquire about a
safety and other characteristics data sheet first. I seem to recall reading
something about the explosive and unstable nature of certain compounds...
There may be a problem with shipping regulations.
The stuff is likely to be a few hundred dollars minimum (confirm or
correct, anyone) and that only, perhaps, if you can convince them that this
is a small sample you want to buy before you do order a truck load of the
stuff. Chemical companies do not like the word "hobbyists" when dealing
with customer inquiries.
Luis Nadeau
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