Price of silver

On Sun, 12 Mar 2006 13:29:37 +1000, Graham Fountain
wrote:

I shouldn't be surprised if photographic demand is actually going up.
While film use and production has reduced, people are printing more than
ever.

Yeah ! With giclee printers ! LOL !!!!!

==
John - Photographer & Webmaster
www.puresilver.org - www.xs750.net

In article
,
Graham Fountain wrote:

Lab printing, even of digital, is all silver based.

That silver is reclaimed, there is no silver left on color papers once
developed.
--
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of ourselves. Better not to hate.

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Dental and photographic uses also declining, silver amalgams with mercury
for fillings are much less popular than in the past and demand for silver
photographic products on the decline as well. I suspect we are seeing some
investor action and speculation.

--
darkroommike
"David Nebenzahl" wrote in message
s.com...
UC spake thus:

Peter Chant wrote:

Mike wrote:

You think photographic demand is the _primary_ demand for
silver?! Its not.

It's 1/4, according to what I found.

According to Wikipedia (http://en.wikipedia.org/wiki/Silver),
photography is "the largest single end use of silver". Summarizing the
uses from their article (no percentages, unfortunately):

o Electrical contacts and conductive coatings (printed circuits)
o Reflective coatings for mirrors
o Coins [definitely a declining use]
o Jewelry
o Dental usage
o Catalyst usage
o Solder
o Batteries
o Explosives (silver fulminate)
o Cement for glass (silver chloride)
o pH testing electrodes (silver chloride)
o Cloud seeding (silver iodide)
o Medical uses (silver nitrate & silver sufladiazine, both declining)


So what was your question again?


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It's obviously not 100% recyclable even if you could get 100% out of the
spent bleach and fixer. But the effluent has to be 99.9999% free (or
something like that). A lot of small labs just save the silver in a draw or
store the recovery cartridges since they can't get enough money for them to
justify the shipping, so I guess technically mini-labs are hoards.

--
darkroommike
"Greg "Blank" - Lizard King." wrote in message
...
In article
,
Graham Fountain wrote:

Lab printing, even of digital, is all silver based.

That silver is reclaimed, there is no silver left on color papers once
developed.
--
The things we hate most in life often turn out to be a mirror image
of ourselves. Better not to hate.

Findmedirectly - "infoatgregblankphoto.com"

In article ,
"Mike King" wrote:

It's obviously not 100% recyclable even if you could get 100% out of the
spent bleach and fixer. But the effluent has to be 99.9999% free (or
something like that). A lot of small labs just save the silver in a draw or
store the recovery cartridges since they can't get enough money for them to
justify the shipping, so I guess technically mini-labs are hoards.

I merely stated the paper has no silver in it after developing-
otherwise I agree and your points are noted.
--
The things we hate most in life often turn out to be a mirror image
of ourselves. Better not to hate.

Findmedirectly - "infoatgregblankphoto.com"

On Fri, 10 Mar 2006 18:40:54 GMT, Frank Calidonna
wrote:

UC wrote:
But if film consumption is declining, and film use represents 1/4 of
the demand for silver, that's a big chunk!

But silver is used in electronics which are proliferating all over the
world - just like film used to. I think every soldered joint has a bit
of silver.

Sorry about being a bit late about this. Due to the European RoHS
directive tin/lead based solders are being phased out and replaced by
a tin/silver alloy with some other stuff added to enhance
solderability. Doesn't solder half as well as the traditional solder
and costs a bundle. The "other stuff" in the alloy may be even nastier
than lead, as long as it hasn't made it to the finger-wagging list
yet.

- YD.
--
Remove HAT if replying by mail.

On Thu, 16 Mar 2006 21:15:28 -0300, YD wrote:

Sorry about being a bit late about this. Due to the European RoHS
directive tin/lead based solders are being phased out and replaced by
a tin/silver alloy with some other stuff added to enhance
solderability. Doesn't solder half as well as the traditional solder
and costs a bundle. The "other stuff" in the alloy may be even nastier
than lead, as long as it hasn't made it to the finger-wagging list
yet.

- YD.

Something I dug up after Googling "silver solder"

Background
A wide range of alloys have been developed to provide
suitable jointing properties for an even wider variety of
parent materials and applications. Although silver is
predominantly used, other elements within the filler
materials include copper, zinc, tin, nickel, phosphorus,
manganese, silicon and cadmium.
The use of cadmium has particular advantages in
reducing the working temperature required and providing
good flow properties for making the joint. Typically,
between 16-25% cadmium may be present in a
cadmium-containing silver solder (see Table 1). A
cadmium-containing alloy of 42% silver has a melting
range of 608-617°C (BS 1845-AG2) whereas the
‘cadmium-free’ near cost equivalent alloy of 40% silver
has a melting range of 650-710°C (BS 1845-AG20).


==
John S. Douglas
Photographer & Webmaster
www.legacy-photo,com
www.xs750.net

John wrote:
On Thu, 16 Mar 2006 21:15:28 -0300, YD wrote:

Sorry about being a bit late about this. Due to the European RoHS
directive tin/lead based solders are being phased out and replaced by
a tin/silver alloy with some other stuff added to enhance
solderability. Doesn't solder half as well as the traditional solder
and costs a bundle. The "other stuff" in the alloy may be even nastier
than lead, as long as it hasn't made it to the finger-wagging list
yet.

- YD.

Something I dug up after Googling "silver solder"

Background
A wide range of alloys have been developed to provide
suitable jointing properties for an even wider variety of
parent materials and applications. Although silver is
predominantly used, other elements within the filler
materials include copper, zinc, tin, nickel, phosphorus,
manganese, silicon and cadmium.
The use of cadmium has particular advantages in
reducing the working temperature required and providing
good flow properties for making the joint. Typically,
between 16-25% cadmium may be present in a
cadmium-containing silver solder (see Table 1). A
cadmium-containing alloy of 42% silver has a melting
range of 608-617°C (BS 1845-AG2) whereas the
‘cadmium-free’ near cost equivalent alloy of 40% silver
has a melting range of 650-710°C (BS 1845-AG20).

Use of cadmium is deprecated. I no longer recall what is the matter with it,
but it my be just plain toxic, or it may be carcinogenic, or teratological.
But as I recall, you do not want it in your body.

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On Fri, 17 Mar 2006 10:48:18 GMT, Jean-David Beyer
wrote:

Use of cadmium is deprecated. I no longer recall what is the matter with it,
but it my be just plain toxic, or it may be carcinogenic, or teratological.
But as I recall, you do not want it in your body.

Yep. Went over this when Kodak discontinued Ektalure, Elit and
Kodabromide. All had cadmium in them. It accumulates in the body and
can have pretty bad effects on the nervous system.


==
John S. Douglas
Photographer & Webmaster
www.legacy-photo,com
www.xs750.net

"YD" wrote:

Sorry about being a bit late about this. Due to the European RoHS
directive tin/lead based solders are being phased out and replaced by
a tin/silver alloy with some other stuff added to enhance
solderability. Doesn't solder half as well as the traditional solder
and costs a bundle. The "other stuff" in the alloy may be even nastier
than lead, as long as it hasn't made it to the finger-wagging list
yet.

Interestingly, in a current thread on APUG a couple of posters are claiming
that a Pentax decision to discontinue their 645NII and 67II cameras are
seemingly related to just this issue:

http://www.apug.org/forums/showthread.php?t=25827

The following snippet from 'photoscalia' is also referenced:

http://www.photoscala.com/node/view/1260

Ken