Abstract:

The coated and uncoated veneers from poplar and Mongolian Scotch Pine was lighted by Xenon light attenuation tester. The photochroma machinsm and influencing fators were analyzed and the lightfastness performance was evaluated. The coated and uncoated veneers were easy to change color after lighted, with brightness index L* decreasing while chroma indexes a* and b* increasing. The chroma index b* of Mongolian Scotch Pine veneer had a more clear change. The coated veneers by water-borne two-component polyurethane varnish was obvisouly greater than these by water-borne acrylic varnish in the total chromatism value. The coated veneers from Mongolian Scotch Pine was more than these from poplar in the total chromatism value. The print had a more clear influence on the chromatism than veneer species. The coated and uncoated veneers by water-borne two-component polyurethane varnish had no clear influence on the total chromatism value. The coated veneers by water-borne acrylic varnish was smaller than the uncoated veneers in the total chromatism value.

Key words: print coating, poplar veneer, Mongolian Scotch Pine veneer, photochroma