AB Finish

This iridescent finish used on glass and plastic beads is named after the colorful lights seen in northern skies, the aurora borealis, or AB for short. The finish is also called rainbow.

AB beads may be any color and are usually monochromatic and transparent, but they may also be matte or even pearlized, as well as striped or silver-lined. Beads are given an AB finish by passing them through vaporized metal ions. This process leaves a thin deposit on their surface of tiny metallic particles, which break up light waves into the colors of the spectrum, much as water droplets refract sunlight to create a rainbow. This iridescent play of light causes the underlying color of the beads to shift, sometimes considerably.

AB finish is widely used on seed beads and bugles; Czech molded glass beads, both smooth and faceted; plastic plain and fancy shapes; and cut glass crystals.

9/27/2009 : 2015-03-03 modified

Swarovski crystals with AB finish.
Robert K. Liu

Czech firepolished beads, smallest have AB finish.
Robert K. Liu