Simply put, the paper has a pearl like appearance. This makes the prints have a unique and interesting shimmer that adds the appearance of depth. Personally I really enjoy this paper for all of my large prints. Below is Kodak's description for more details.

This paper uses a proprietary combination of film laminate layers that results in striking, three-dimensional, lasting images on an ultra-bright background. Its professional emulsion set provides extreme sharpness, brightness, and color saturation. And there's a dramatic increase in D-max with digital applications. In addition, the paper support offers enhanced durability and tear resistance.

ENDURA Metallic Paper opens a whole new dimension for commercial and portrait output. Its glossy finish and metallic appearance creates images with exceptional visual interest and depth that will appeal to both photographers and display designers seeking a unique look. And it delivers rich, vibrant colors and flattering flesh tones.

Rich, distinctive metallic look that catches the eye

• State-of-the-art image stability* (100 years in typical home display, 200 years in dark storage, 1 to 5 years for commercial display)
• Digital and optical printing capability for improved lab efficiency
• Business-building opportunities for Pro labs, photographers, and specifiers of commercial imaging output services alike
• Enhanced color gamut for rich colors and intense blacks
• Reduced developer replenisher rates to reduce waste and operating costs
• Superior process robustness for improved lab consistency