RE: making gold chloride

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From: Liam Lawless (liam.lawless@blueyonder.co.uk)
Date: 10/16/02-10:05:29 AM Z

It is slow, but no need to heat if you're not using a huge lump of gold and
you're prepared to wait overnight. Leave in a ventilated place where the
fumes won't cause harm to metals, fabrics, etc., though there's not much
fuming without heat. I haven't used gold chloride in solid form, but the
textbooks tell us it's deliquescent, meaning it dissolves in water absorbed
from the air, for which reason it used to be supplied in glass phials. In
my experience, acidity doesn't matter for use in toning or sensitisers, but
the solution can be neutralised with whiting (chalk), forming a calcium-gold
salt with - as far as I could tell - just the same properties.

Liam
-----Original Message-----
From: Monnoyer Philippe [mailto:monnoyer@imec.be]
Sent: 16 October 2002 13:30
To: alt-photo-process-l@sask.usask.ca
Subject: RE: making gold chloride

Note that gold is quite slow to dissolve in aqua regia. You will have to
help it by a gentle warming. For dissolving platinum, it's even worse.
Boiling aqua regia is barely sufficient.

Philippe

|-----Original Message-----
|From: Finn Ugor [mailto:finnugor729@hotmail.com]
|Sent: Wednesday, October 16, 2002 13:19
|To: alt-photo-process-l@usask.ca
|Subject: making gold chloride
|
|
|
|
|Hi,
|
|
|Does anyone of you know a procedure to make gold
|(III)-chloride from pure
|gold? I know, that gold has to be dissolved in aqua regia. But
|how should I
|get solid gold chloride out of the aqua regia? Any ideas are welcome.
|
|Thanks
|
|Istvan
|
|
|
|
|
|
|Hi,
|
|
|Does anyone of you know a procedure to make gold
|(III)-chloride from pure
|gold? I know, that gold has to be dissolved in aqua regia. But
|how should I
|get solid goldchloride out of the aqua regia? Any ideas are welcome.
|
|Thanks
|
|Istvan
|
|
|
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