Why does the Dansco 7070 require a 1"slipcase?

ecichlid

Why does the Dansco 7070 require a 1"slipcase? Jake's Marketplace says it does. I only own the Buffalo nickel album, so I may be missing something here.

MrSpud

Ummm.... not sure, but the Dansco Slipcases are similar to Intercept Shield material designed to lessen the chances of causing the coins to tone and or tarnish if that helps any. They basically have copper powder impregnated in them and the copper is more reactive to tarnishing agents than the coins.

ecichlid

Interesting, I didn't know that about about the copper.

Someone must have the 7070 album!

droopyd

<< <i>Ummm.... not sure, but the Dansco Slipcases are similar to Intercept Shield material designed to lessen the chances of causing the coins to tone and or tarnish if that helps any. They basically have copper powder impregnated in them and the copper is more reactive to tarnishing agents than the coins. >>



Unless of course they are copper coins?

MrSpud

Supposedly the copper powder impregnated into the polymer/paper has more reactive surface area than the coins. Magic "Buckyball" copper/polymer/paper.

From Intercept Shield's patent(The Dansco slipcase is supposedly similar)

"Thus, using the current methods, the surfaces of paper or foam core products are treated for the purpose of inhibiting degradation resulting from contact with atmospheric gases, whether the degradation of the paper and foam core products themselves, or the degradation of other items placed within those products when the paper and foam products are used as packaging. Such degradation can be in the form of corrosion and/microbial growth (particularly mildew and fungus).

Such undesirable degradation is minimized or prevented using reactive polymers which have been incorporated into or applied to the surface of the paper and foam core, as disclosed herein. By "reactive polymer" (RP) the present invention refers to compounds wherein solid-state reactive materials are incorporated into a polymer matrix. More specifically, such reactive polymers are polymers incorporating a corrosive gas reactant material (the reactant material being any of the transition metals), the reactant material having been catalyzed to become part of the polymeric structure. Such reactive polymers were developed by AT&T Bell Laboratories (currently known as Lucent Bell Labs Technologies), and are disclosed in U.S. Pat. No. 4,944,916 issued to Franey. Similarly, they are discussed in John Franey, A New ESD Corrosion Preventive Polymer, EOS/ESD Symposium Proceedings 1991, EOS/ESD Association, Rome N.Y. (which association has a website at www. esda.org), and are discussed at www. staticintercept.com. The contents of that publication and those websites are fully incorporated herein by reference. The materials neutralize corrosive gases commonly associated with corrosion and tarnishing, preventing them from interacting with the underlying material of the protected product or from interacting with the product's contents. Alternatively or additionally, the reactive polymers include copper, which has been known to be a passive mildewcide and fungicide when in intimate contact with an object.

In the preferred embodiment of the invention, the reactive polymers are those available from Engineered Materials, Inc. of Buffalo Grove, Ill. under the trade names Static Intercept.RTM. and Corrosion Intercept.TM.. The corrosion reactive polymers are manufactured by catalyzing copper material into polymer chains to form a homogeneous polymeric/metallic structure of low-density polyethylene (LDPE). The static version uses the structure of the corrosion polymer plus an additional catalysis of C12 into the poly-metallic structure to form a copper/metal/oxide semi-conductive media, which utilize the `Bucky Ball` phenomena to provide paths for electron flow within the structure The LDPE structures are formed into standard pellets and processed into various final structures, the most common of which is blown film to manufacture bags.

Once incorporated with reactive polymer, the surfaces of the packaging preferably have a chemically neutral pH (preferably in the approximate range of 7.0 to 7.5). Packages are designed so that, when closed, they have RP on the majority of the inside surfaces. In the preferred embodiment of the invention, the treated surfaces of the packaging have greater than two square centimeters of RP surface per square centimeter of surface of the product to be protected therein. Further preferably, the permeability of any package cross sectional structure is approximately or less than 0.015 g/M.sup.2 Moisture Vapor Transmission Rate.

Also in accordance with the invention, the paper based packaging materials are comprised of cellulose-based packaging materials, which are of high alpha-cellulose content and are negative to lignin side chains. When packed with the material to be protected, the unfilled interior volume of the package is preferably less than 25% of the total interior volume of the enclosure. In addition, adhesives are avoided in the packaging (and/or in the product), or adhesives are used having chemicals that do not contribute to the corrosion or other degradation of the material to be protected."

The whole patent can be viewed here by entering 6,593,007 in the number search engine
Pantent Number Search

BECOKA

Of course why would someone want to keep their coins from toning. I would not use the slip case. Nice rim toning happens over time and gives a unique look to each coin.

coindeuce

<< <i>Why does the Dansco 7070 require a 1"slipcase? Jake's Marketplace says it does. I only own the Buffalo nickel album, so I may be missing something here. >>



The 1" slipcase is the size necessary to fit the standard thickness of the 7070 album. The number of standard pages in a particular Dansco album dictates the width of the album spine. They're not all the same.

ecichlid

I guess I'm slow. I'll pose it this way. My Buffalo album does require a slip case cover, why does the 7070 require it?

coindeuce

Sez who? As far as most are concerned the slipcase is totally optional. Appears to me that Jake's is just trying to jack you for extra green.

ecichlid

Thank you coindeuce.

coindeuce

Welcome to the forum. Hope your visit here is long and informative.

ecichlid

Thank you. The people here are tremendous. I can't tell you the number of hours I have spent lurking...er...reading.