SILVER OXIDE

Guillermo Penate (guillermo.penate@canrem.com)
Thu, 19 May 1994 08:51:00 -0400

PJ+This might be an appropriate time to ask about Mike Ware's new argyrotype
PJ+process, an iron based process involving silver sulphumate. Sulphamic acid
PJ+is pretty cheap; but the problem I've come up against is its use of silver
PJ+oxide instead of silver nitrate. Although the oxide has a slightly ^^^^^^
PJ+^^^^^ higher silver content than the nitrate, because it's manufactured
PJ+in an analytical grade, as against the nitrate, which must be widely used
PJ+commercially, there only seems to be one source in Australia at about FIVE
PJ+times the price. Can anyone suggest an alternative source? I wrote to
PJ+Photographer's Formulary asking for a catalogue but didn't recieve a
PJ+reply. Can chemicals be shipped out of the US?

Silver oxide is not listed in my 1993 catalog (just the nitrate).
Chems can be shipped out of the US, any restriction then resides in the
country postal service receiving the shipment.

Regards,

Guillermo Penate

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