Authentic Polish ornaments are still made using traditional mouth-blown techniques in regions like , Krosno , and Józefów .
While early versions used mercury or lead, safety concerns led to their replacement with silver nitrate to achieve that iconic mirror finish from within. How They Are Made: A Craft of Fire and Air polish-mercury-glass-ornaments
Despite the name, modern mercury glass does not actually contain mercury. The technique, also known as "silvered glass," originated in 19th-century Bohemia and eventually spread to Poland. Authentic Polish ornaments are still made using traditional
By the late 1800s, this technique was adapted for Christmas ornaments, offering a "poor man's silver" look that was affordable yet stunningly radiant. also known as "silvered glass