Mint says don't keep L&C coin in the pouch
kranky
Posts: 8,709 ✭✭✭
CW reports that the Mint is including a message with the L&C coin/pouch sets warning people that the coin could be adversely affected by the materials used to make the pouch. I'm assuming they meant over time, not immediately.
I didn't get any myself, and didn't know if the note was inside the package or not. A lot of people don't open their sets and if the note is inside, I figured some of you might not see it.
I didn't get any myself, and didn't know if the note was inside the package or not. A lot of people don't open their sets and if the note is inside, I figured some of you might not see it.
New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.
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Isn't that the note you were referring to?
this is just the sort of thing I was saying with the PCGS wood boxes...and kept getting ridiculed for by a select few. I paste relevant info for those interested, and YES, LEATHER is absolutely insane and worse than wood IMHO - if you want the data it is in the links:
<< <i>From Redlines conversation with Mr. David Scott, Head Curator of Metals at the Getty Conservation Institute "If you want to display your cars, do not, I repeat DO NOT, display them in wooden display cases, especially ones with unpainted/unvarnished surfaces. Doesn’t matter what kind of wood — just don’t do it. If you currently have cars in such a case, I highly recommend you remove them AT ONCE. The organic acids from the wood will really eat away at the cars, particularly if the case closes fairly airtight. >>
....thought you might be interested in some information about storing metal in wood I have been posting since around the time the PCGS wood boxes were issued. I love coins, have been involved in various areas of conservation for 18 years or so and know from related experience that wood can cause "toning" on metal - I think it will be shown to be a matter of how much - not if. Slabs are not hermetically sealed and will be exposed to the outgassing or various organic acids and other harmful fumes from the wood itself, the adhesives used in construction and even the fabric can be harmful - especially if in an uncontrolled or concentrated environment such as a deposit box. How well the newer slabs will hold out against the incursion of acidic fumes is unknown, but that they are not airtight is known. Wood is, in short, not the best choice. The display cases made by member SOLID are great IMHO because they are open displays - and they do suggest you do not store the wooden part in a safe or deposit box - just the aluminum tray (anodized aluminum is the material of choice for long term storage). At least 1 person concerned about this who contacted PCGS has already been offered a refund for his PCGS wooden boxes as "there will be no short term answer", and I heard from Mr. Hall that accelerated testing would take a month or two and we will be made aware of the results - unfortunately it seems they were not subjected to testing pior to marketing. There are also a few questions in the Q+A about this topic from myself and another. Several people have made excellent posts - Frattlaw showed with pics what I was writing about - slabs do not provide complete protection in the presence of acetic acid - which is found in wood - especially oak which the PCGS boxes seem to made out of. Oak emits up to 5% of its weight in acetic acid. MrSpud has written excellent posts about the chemical aspects of toning as well as raising awreness of the book Coin Chemistry by W. White. As I said in an earlier post - even if storage in wood is said to be 90% safe with 90% certainty, why risk a collection that has taken time, effort and money to assemble? Because they are pretty is not enough reason for me. And, no one has yet posted any BENEFITS at all of storage coins in wood to my knowledge.
Best,
Billy
CARING FOR YOUR METAL OBJECTS
The American Institute for Conservation of Historic & Artistic Works
Prepared by Julie A. Reilly with assistance from David Harvey and Julie Lauffenburger, 2001.
"The characteristic tarnish on silver is black silver sulfide. Acidic gasses from wooden cabinets and cases can also cause metal corrosion. Vapors produced by plywood and other products that off-gas formaldehyde cause lead alloys and other metals to corrode, forming wispy white crystals often confused with mold growth. Keeping metal objects in a clean, dry, safe environment can prevent deterioration from environmental sources."
"Metals, in general, should be stored with inert storage materials. For example, metal cabinets and shelving should be used rather than wood cabinets and shelving. As discussed earlier, many woods and wood products, like plywood, emit acids and other gasses that cause metals to corrode. Acidic newsprint and cardboard boxes should be avoided. Acid-free, lignin-free wrapping paper and boxes are better. Clean, soft cotton cloth can also be used."
and:
Link to Data - if this doesnt convice you there is potential for harm from wood boxes nothing will
"Original" Wood Post (sent to Mr. Hall Aug 5th, responded Sept. 14th....just 3 days after my ORIGINAL Poll (below) closed where 78.79% voted "wood has the potential to harm coins")
Original PCGS Wood Poll Thread (more data)
Link To Another Wood Thread
<< <i>this is just the sort of thing I was saying with the PCGS wood boxes...and kept getting insulted for by a select few. >>
Yes, it is a bit "clicky" around here.
<< <i>
<< <i>this is just the sort of thing I was saying with the PCGS wood boxes...and kept getting insulted for by a select few. >>
Yes, it is a bit "clicky" around here. >>
Hi,
well, in the end, some people are little more than the gibbering icons they appear to be
Best,
Billy
"never sweat anything small enough to step over" - mb
Best,
Billy
New collectors, please educate yourself before spending money on coins; there are people who believe that using numismatic knowledge to rip the naïve is what this hobby is all about.
<< <i>A conservation expert (Susan Maltby) was quoted as saying the organic material in the pouch could corrode (her word) the coin. >>
Hi,
I quoted her long ago in a thread in the post above - I think MaCrimmon (sp?) pointed out she had made similar comments in CoinWorld on wood storage boxes. You have helped mine and others efforts regarding these storage boxes and storage in general with your post. I had hoped these concerns would be taken more seriously - maybe now they will. Thanks!
An example of both leather and wood "burning" paper on long storage (for those following along notice the wood was waxed): Also, this is an illustrative example - I am not claiming these results are indicative of the amount of "toning" potential on a slabbed coin, although the book in question was "only" published in 1960.
Informal Observations on "Leather-Burn", Acidity, and Leather Lubricants
By Tom Conroy
1526 Edith St., Berkeley, CA 94703
"All book conservators know that leather turn-ins discolor or "burn" books' endpapers, and that the amount of "leather-burn" varies with the leather, the paper, and the age of the book. We all have our favorite examples; mine is a magnificent Oxford Lectern Bible bound by Roger Powell in full green Chieftain goat with doublures formed by the bare, waxed oak of the boards, and with white free endpapers. The leather has burned the endpapers brown, the oak has burned them slightly less with the wood grain reflected in the burn, and I cannot decide whether I deplore the echoed pattern as damage more than I admire its beauty..."
Billy
On the other hand, you may get nice toning over time, or you may get some nice pits.