Well! Thank you all for your input. This was instructive on even more 
aspects that I've expected!

Good day from Montreal!

JF

On 6/7/2012 8:28 AM, Larry Dzaugis wrote:
> Tarnished silver is a great conductor, it will not solder easily.
>
> Diodes with silver leads were easily ruined if not kept in a nitrogen box.
> Attempts to clean the leads would have the cleaner or flux eat into
> the glass diode.
> The diodes were scrap if tarnished.
>
> I am testing air in a factory now for the sulfur causing tarnish on
> immersion Ag PCB's.  The Immersion Sn show no effect. The suspect is
> the drywall, new construction or an industrial chicken farm at the end
> of the industrial park.or some other source. Same process, materials
> and equipment do not see this effect at a different factory with
> greater humidy swings from 10% to 85%.
>
> On 6/6/12, Goodyear, Patrick<[log in to unmask]>  wrote:
>> HMMM, NOS I can understand mainly with electronic assemblies and not car
>> parts though.
>>
>> I seem to remember from my High School and College Chemistry and Physics
>> classes that tarnished Silver is a better conductor then the clean silver,
>> considerably.    I remember that being drilled into our heads in Navy ET
>> school as well that one was never to "clean" silver connectors and that was
>> why all Mil-Spec RF connectors were silver plated.   I want to remember that
>> Silver Oxide was right next to bare clean copper in conductivity.   I
>> believe even the lugs connecting to the high voltage buss work were silver
>> plated.
>>
>> I know when we make connections at the power plant the electricians use a
>> silver plating powder (Cool-Amp) to coat the connection point, this is
>> especially true with aluminum wiring.
>>
>> Cardboard is a great storage medium, it absorbes moisture, just don't want
>> to get it soggy.
>>
>> Pat
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
>> Sent: Wednesday, June 06, 2012 11:06 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] Electronic assemblies packaging
>>
>> Probably, it certainly is a short range force as it only works near
>> transmitters.
>>
>>
>>
>> Regards
>>
>>
>> Mike
>>
>>
>>
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Whittaker, Dewey
>> (EHCOE)
>> Sent: Wednesday, June 06, 2012 4:58 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Electronic assemblies packaging
>>
>> Of course the solder joints on your radio are still shiny due to all the
>> string theory buffs.
>> Dewey
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
>> Sent: Wednesday, June 06, 2012 8:48 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] Electronic assemblies packaging
>>
>> Dampness will improve the static dissipation properties of the card, for
>> other properties I offer a personal observation rather than rigorous data:
>> I own an old car (~50 years) and am always on the look out for what is known
>> as N.O.S. parts. Especially electrical parts like switches, dials/gauges
>> etc. For non classic car fans, "NOS" means new old stock. In other words the
>> parts are also 50 or more years old, but have not been used so are in
>> original packing - cardboard. [This is not for sentimentality but because
>> the original old stock is better made than modern reproductions and does
>> things like work and fit.] Terminations on this old stuff are nearly always
>> perfectly clean and shiny, although the boxes are usually a little sad.
>> Soldered joints are bright, but what would constitute tracking (very thing
>> copper pieces in some gauges) is usually dull.
>> 50 years is about 40 more than the planned storage time and predates nearly
>> all auto electronics, so can't comment on that. [Although I do have a rather
>> modern late 1960s early 70s radio complete with push button tuning - string
>> operated of course!]
>>
>> Regards
>>
>>
>> Mike
>>
>> Bonding Services&  Products
>> M: +44 [0] 7810 526 317
>> T: +44 [0] 1865 522 663
>> E: [log in to unmask]
>>
>>
>>
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
>> Sent: Wednesday, June 06, 2012 3:23 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Electronic assemblies packaging
>>
>> Maybe I missed something, but that article didn't seem too enlightening.
>> Isn't it common knowledge that bare copper will tarnish?
>> and that silver coatings need to be protected with "silver saver" paper or
>> some type of good packaging until used?
>> (a "no brainer" study, if you ask me...)
>>
>> It might not be wise to store "piles of reels" in cardboard boxes for nearly
>> a decade, but the component termination plating on those probably aren't
>> copper or silver.
>>
>> I thought the original question was about shipping final product, not about
>> wettability.
>> What is the danger of shipping AFTER SOLDERING in cardboard?
>> Maybe not the cardboard,
>> probably the moisture.
>>
>> Jack
>>
>> .
>> On Tue, 5 Jun 2012 20:33:27 -0400, Robert Kondner
>> <[log in to unmask]>  wrote:
>>
>>> Hi,
>>>
>>> Having used card board shelving supplies for years I was curious. I
>>> heard about solderability issues but never noticed issues. So I was
>>> wondering if this was hogwash or not.
>>>
>>> So I did a little web look up and found this note:
>>>
>>> www.kondner.com/files/cardboard_soldering.pdf
>>>
>>> Now I have parts in plastic bags and the cardboard containers do have
>>> small holes, that might help vent. Our temperature is lower probably
>>> around 20 - 23C.  But the result in the paper were a BIG surprise.
>>> Likes like it is a real issue and NOT hogwash.
>>>
>>> I have a pile of 1206 reels that have been sitting in a card board box
>>> without plastic bags for maybe 10 years. I will need to take a look.
>>>
>>> Bob K.
>>
>>
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