Lamination adds a 1.5 Mil thick plastic film via a heat process to the poster. This is similar to the lamination on an ID card, only not as thick. Lamination adds a layer of protection as well as increasing the saturation of the colors. It's a great alternative to traditional glossy photographic prints.
Please Note: 20 x 30 Posters and larger are printed using heat sensitive inks and should not be laminated. The print will be damaged.