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From: Patent Tactics, George Brock-Nannestad Hello, I have looked at the Delkin claim that the product has "20 cents of 24k gold in every disc". The present cost of gold is USD430/troy ounce (ca. 31 gram). Gold has the density 19.3 g/cubic cm. A CD has a diameter of 120 mm. Using the precise values and simple arithmetics (but reserving the right to have miscalculated!), I have determined the thickness of the gold layer to be 66 nanometer, corresponding to 660 angstrom. Extrapolating information from a book from 1955 a deposited film of that thickness in gold could well have a reflectivity of 60% - however a lot has happened since then, and more precise figures may be available. However, there the sources dry out - I have no idea how this compares to other types of disc, except that tarnishing of gold is unlikely. However, I have also read the "White paper", and I find that it could possibly be better written by a college student. Kind regards, George > I wonder if Delkin licensed the old Kodak patents? Kodak used to claim a > 300 year life-span, which is something that Mistui has never done. > > David Seubert > UCSB > > Prentice, Will wrote: > > >Colleagues > > > >The press release at the bottom was posted to the AMIA list on 29 October. > > > >Has anyone tried these Delkin discs? I don't know if MAM-E or MAM-A have "20 > >cents of 24k gold in every disc", but otherwise there's nothing to suggest > >these are significantly different as far as their constituent parts are > >concerned. If anyone can find some more detailed data on these I'd be > >grateful if I could see it. > > > >Assuming they prove to be reliable, it would be useful to have another > >manufacturer of gold reflective layer CD-R's in the game. MAM-E no longer > >manufacture DVD-R discs with a gold reflective layer, for instance. If Delkin > >or someone else moved in to that market successfully, there's a vague > >possibility that MAM-E might reconsider. > > > >Will > > > >..................................... > >Will Prentice > >Technical Services > >British Library Sound Archive Tel: +44 (0)20-7412-7443 > >(formerly National Sound Archive) Fax: +44 (0)20-7412-7416 > >96 Euston Road http://www.bl.uk > >London NW1 2DB UK http://cadensa.bl.uk (online catalogue) > > > > > > > > > >http://www.delkin.com/delkin_news_press_release.php?id=37 > ><http://www.delkin.com/delkin_news_press_release.php?id=37> > > > > > >WORLD'S MOST RELIABLE CD-R FROM DELKIN > > > > > >October 7, 2004 > > > > > >For Immediate Release > >Contact: Alan Parry > >Marketing Department > >858-391-1234 > >[log in to unmask] <mailto:[log in to unmask]> > > > > > >Delkin Devices, Inc., manufacturer of quality eFilm memory cards and > >other innovative products, today introduced the eFilm Archival Gold > >"300-Year" CD-R. eFilm Archival Gold CD-R's incorporate patented > >Phthalocyanine (thalo-sy-a-neen) dye and a 24k gold reflective layer > >into every CD-R. The innovative materials found in eFilm Archival Gold > >CD-R's make them one of the most reliable storage medium available. > >Typically CD-R's are known to deteriorate quickly due to Earth's common > >elements: ultra violet light, heat, and humidity. Using an accelerated > >aging process to test the longevity of CD-R media, eFilm Archival Gold > >CD-R's have been shown to safely store your images for more than 300 > >years. > > > >"Consumers are now taking more pictures than ever with digital cameras," > >explains Martin Wood, CEO of Delkin Devices, Inc. "Our research has indicated > >that the number one reason consumers take digital images is to preserve their > >precious memories. eFilm Archival Gold CD-R's ensure that your precious > >memories are safe for years to come." > > > >The patented Phthalocyanine dye is the most critical component of the > >CD-R because it is where your data is stored. Your CD burner creates > >pits in the dye layer when it burns a CD-R and your digital information > >is stored in these pits. The Phthalocyanine dye reacts quicker to the > >writing laser than dyes found in most CD-R's on the market, thus making > >sharper pit edges and making your CD-R easier to read by CD drives. > >Compared to Cyanine and Azo dyes found in the majority of CD-R's on the > >market, Phthalocyanine dye lasts significantly longer when subjected to > >the harmful effects of UV light, heat, and humidity. > > > >Gold is one of the most inert elements on earth and Delkin incorporates > >20¢ of 24k gold into every eFilm Archival Gold disc. Gold's inert > >characteristics prevent oxidation, a common cause of failure to most > >CD-Rs. Along with the Phthalocyanine dye and gold reflective layer, > >eFilm Archival Gold CD-R's provide the most extreme protection for your > >digital images from environmental degradation. > > > >"People used to save their photos in family albums and store their > >negatives in a safe place for reprints," says Wood. "In the digital age, > >people store their photos on their computer. With the volatility of computer > >hard drives and the constant threat of virus attacks, we wanted to provide > >consumers with the most reliable storage medium available to back up their > >images." > > > >Delkin will begin shipping eFilm Archival Gold CD-R's in early October > >in a variety of quantities and types of packaging. The CD-R 10 Pack will be > >sold in a protective plastic case that holds 10 CD-R's in polypropylene > >sleeves. There will be a 1" 3 ring binder available with 16 eFilm Archival > >Gold CD-R's in protective sleeves. The 25 pack will be available in a cake > >box type spindle. Delkin also plans to ship 100 CD-R's in bulk packaging. > >eFilm Archival Gold CD-R's will be available at consumer photography and > >electronic stores worldwide and online at Delkin's website at www.delkin.com. > > > >"Our eFilm Archival Gold CD-R's will be a perfect companion to our > >BurnAway as well," explains Alan Parry, Director of Marketing at Delkin > >Devices, Inc. "The combination will provide consumers with a reliable > >storage device and medium without the use of a computer." Delkin has > >released a white paper further discussing the details of CD-R media. You can > >download the white paper at www.archivalgold.com > ><http://www.archivalgold.com/> . > > > >Delkin Devices, Inc., based in San Diego, California, has been operating > >since 1986. Since that time Delkin's eFilm digital storage products and > >accessories have become an industry leader in both OEM and consumer markets. > >Known as the "Camera Store" brand, eFilm is available worldwide primarily > >through a network of independent camera stores, and a leading choice among > >photographers passionate about digital photography. > > > >Delkin's success has been the result of providing a broad range of > >products with premium quality, innovative designs and an ongoing > >dedication to superior customer service. Delkin's website attracts > >visitors from over 100 countries, underscoring the company's > >international success. > > > >END > >FOR IMMEDIATE RELEASE > > > >Media Images are available for download at: www.delkin.com/media_images/ > ><http://www.delkin.com/media_images/> > > > >Delkin Devices will be appearing at PhotoPlus Expo in New York City > >October 21-23 Booth:761 > > > > > > > > > > > > > >************************************************************************** > > > >Experience the British Library online at www.bl.uk > > > >Help the British Library conserve the world's knowledge. Adopt a Book. > >www.bl.uk/adoptabook > > > >************************************************************************* > > > >The information contained in this e-mail is confidential and may be legally > >privileged. It is intended for the addressee(s) only. If you are not the > >intended recipient, please delete this e-mail and notify the [log in to unmask] > >: The contents of this e-mail must not be disclosed or copied without the > >sender's consent. > > > >The statements and opinions expressed in this message are those of the > >author and do not necessarily reflect those of the British Library. The > >British Library does not take any responsibility for the views of the > >author. > > > >************************************************************************* > > > >