Now I like to talk about these Ultradiscâ„¢ 24 KT Gold CD-R
They are hard to find and are sold for at least 2.30$ a piece if you buy a spindle of 50:
Or even 4$ a piece if you buy a few in jewel cases:
In this last link you can read claimsmade about the dye used for manufacturing:
Proprietary Photosensitive Dye
Unlike commonly used CD-Rs containing Cyanine (blue/green dye) or Metal Azo (deep blue dye), which lose their characteristics quickly from exposure to light and heat, the 24KT Gold ULTRADISC CD-R utilizes a patented photosensitive dye which ensures accurate burning and stability, plus exceptional longevity and durability.
Whereas the two other types of dye are formed with linear molecular structures, which break down easily when exposed to the elements, the unique photosensitive dye utilized in the ULTRADISC CD-R has an annular structure which forms a strong and extremely stable chemical bond
And how this dye is supposed to react under the laser:
Accurate and Precise Information Retrieval
The ULTRADISC CD-Râ€™s specialized dye reacts more quickly to the writing laser than do other dyes. It reacts in a “burst” mode instead of the sluggish “melt” mode. Due to this instantaneous reaction, precise pit edges are formed.
So it is said that this Â« unique photosensitive dye Â» utilized for the Ultradiscâ„¢ 24 KT Gold CD-R"s does not contain Cyanine (blue/green dye) or Metal Azo (deep blue dye).
This unique dye used has an annular molecular tructure and is probably not Phthalocyanine.
So what is left as possible dye ?
Oxonol non-metallic organic (Fuji)
or Metallic Dipyrromethene (Mitsui)
The last to dyes are supposed to be used by for DVD and maybe not for CD-Râ€™s
as said here :
Â« Advanced concepts of blank DVD media quality Â»
But Ultradiscâ„¢ 24 KT Gold DVD-R exist also and with the same claims for the dye quality and longevity :
So I like to know what the experts think about these Ultradiscâ„¢ 24 KT Gold CD-R
- realy worth the money (3$ or 4$ a piece)
- or are the Â« HiSPACE CD-R Digital Photo - Gold technology Â» such as good in quality ? (I cant get them in Europe for around 0,70 â‚¬ a piece)
BTW who do you think makes these Ultradiscâ„¢ 24 KT Gold CD-Rs for ‘Mobile Fidelity Sound Lab’ ?
- Probably not MPO in France ?
- MAM-E at Ensisheim (France) does not exist anymore â€¦
- so probably an other factory: in the US ?
- or does MSFL has itâ€™s own factory and inspectors wearing medical gloves
as described here: