Phthalocyanine dye, developed and patented by Mitsui, and the research partially funded by Kodak, makes discs more resistant to UV light. While other dyes are very reactive to UV light unless "stabilizers" are added, Phthalocyanine dye is naturally stable, so no additives are needed.

The Light Fastness Test below shows that the KODAK Gold Preservation CD-R will withstand the full spectrum of light, same as the sun, for 100 continuous hours without damage. Cyanine dye, begins to deteriorate after only 20 hours and fail at 65 hours.

KODAK Preservation discs withstand more than 100 hours of continuous sunlight.

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