we provide information about gadget news and price information and specs samsung, huawei, Tecno Price products, Specifications, Features and more information about software from blackberry and android

Thursday, January 31, 2013

Presence of Gold in CD’s & DVD’s

Presence of Gold in CD’s & DVD’s - Did you know that every day there is always a new technology that is created? if you want to know please refer to the blog Gadget News well now we will discuss first about Presence of Gold in CD’s & DVD’s as you need now, we have compiled this article carefully, so please see to finish.

Articles : Presence of Gold in CD’s & DVD’s
full Link : Presence of Gold in CD’s & DVD’s

You can also see our article on:


Presence of Gold in CD’s & DVD’s


With a CD having a diameter of 12 cm, and the inner non-writable part having a diameter of 4 cm, we get a total writable area of around 100 cm². I read somewhere that the different densities of the “gold, silver, aluminum” layer are between 20 to 100 nanometers (billionths of a meter). Assuming the worst case scenario, 100 nanos, we get a total gold volume of 0.00001 cm³. At a gold density of about 19.5 g/cm³ this volume equals 0.000195 g. With one troy ounce equal to 31.1 g., this weight of gold equals 0.00000627 troy oz., or rather, one troy ounce of gold is good for 160,000 CD-Rs. At a gold price of U$S 450 per troy ounce, there is U$S 0.0028 gold per CD-R, or 0.28 cents worth of gold. Of course, the density of the gold layer could be as low as 20 nanometers. In that case, the gold content in the CD would be worth 0.06 cents, and one ounce of gold would be good for 800,000 CD-Rs. So there you have it.

One final step. 10 billion writable CDs are sold every year (versus 20 billion audio CDs). The gold/silver CDs are phthalocyanine, and I read this type of CD is second in market share. So let's give the gold/silver CDs a 25% market share. Now let's assume the gold variety is about half of that, so the total gold CD market share is about 12%, or 1.2 billion CDs annually. With one ounce of gold good for 160,000-800,000 CDs, we need a block of gold every year that is from 2,400 to 12,000 cm³ or a cube with each side being 13 to 23 cm long (5 to 9 inches). This block would weigh 100 to 500 pounds and be worth 700,000 to 3,400,000 dollars. So there you have it.



article Presence of Gold in CD’s & DVD’s has been completed in the discussion

hopefully the information Presence of Gold in CD’s & DVD’s that we provide can be useful for you to know the development of technology in the present

articles Presence of Gold in CD’s & DVD’s we have conveyed to you, if feel this information is useful and you want to bookmark or share so that more people who know please use link https://profsmythe.blogspot.com/2013/01/presence-of-gold-in-cds-dvds.html.

Tag :
Share on Facebook
Share on Twitter
Share on Google+
Tags :

Related : Presence of Gold in CD’s & DVD’s

1 comments: