A form of Phthalocyanine dye called Copper Pthalocyanine is used to make a
blue pigment for artists paints. Another variety is Chlorinated Copper
Pthalocyanine, a green dye also used for paints. They're regarded as being
very fade resistent, nearly as fade resistant as mineral based colors like
Aquamarine (ground Lapis Lazuli) or Cadmium Sulphide, and much more fade
resistant than most dyes. Dyes are rarely used to provide color in artists
paints because most are fugitive (they fade fast).
--
Chris Crawford
Photography & Graphic Design
Fort Wayne, Indiana
http://www.chriscrawfordphoto.com My portfolio
http://blog.chriscrawfordphoto.com My latest work!
http://www.plumpatrin.com Something the world NEEDS.
On 5/13/08 9:08 PM, "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> Phthalocyanine dye is what you're looking for. Just don't store your
> CD's and DVD's in a tub of solvents. Phthalocyanine dye doesn't do well
> in those environments.
> <http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGY-4JV447Y-1&_use
> r=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_ur
> lVersion=0&_userid=10&md5=ce5b8ca1cb2c7f96189e9e698a25bff1>
>
> Chuck Norcutt
>
>
> Moose wrote:
>
>>
>> In both cases, it's not just the gold reflective layer that gives the
>> longevity. The second major component in computer writable CDs and DVDs
>> is the dye that changes color when the laser hits it. The only dye so
>> far known that doesn't fade/deteriorate relatively rapidly is patented
>> by Mitsui. I think all name brand gold disks use the Mutsui dyes, but
>> there's nothing to stop someone from making gold disks with inferior
>> dyes to make a quick buck.
>
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