I say chromium; my friend says aluminum. Is either of us right or both wrong?
2007-01-09 00:57:48 · 4 answers · asked by FourHead 2 in Science & Mathematics ➔ Chemistry
Its aluminum layer for reflective surface, i am not sure whether chromium are used for commercial production of cd reflective layer.
Hope this helps in settling your fight....
2007-01-09 01:25:51 · answer #1 · answered by Anjana 1 · 0⤊ 0⤋
Both are now mostly aluminum. Colored mirrors are sometimes made from other metals, and metallic compound (yellow mirrors are often Titanium Nitride), and some times dyed.
Heated aluminum vapors deposit on the surface under vacuum, much like steam fogs a piece of cold glass. A very long time ago mirrors were made with silver, but that became very expensive.
Given that some forms of Chromium are cancer causing, definitely NOT chromium. Chromium is a very controversial pollutant these days, highly regulated and at least 10 times more expensive.
2007-01-09 09:32:48 · answer #2 · answered by James H 5 · 0⤊ 0⤋
On a CD The actual information storage medium on a cd is aluminum, but the disc is a super high purity optical grade polycarbonate plastic.
2007-01-09 01:07:31 · answer #3 · answered by JoeCoolTrio 2 · 0⤊ 0⤋
niether one of those ...on the mirrors it used to be silver
2007-01-09 01:08:35 · answer #4 · answered by connie sue 5 · 0⤊ 0⤋