Nulab uses Kodak Professional Endura paper.
Lustre has a regular finish (rather than a gloss or matte) and is a specially designed paper created for professional print labs. Learn more on the official Kodak Endura product page.
Metallic has paper enjoys a distinctive metallic appearance that creates a dramatic luminous effect on brighter parts of the image. Learn more on the official Kodak Endura Metallic product page.
Check out this video of the Kodak Endura Metallic Paper that our labs use: