Kokomo Opalescent Glass (KOG), one of the United States’ most historic art-glass manufacturers, has stopped glass production at its facility in Kokomo, Indiana, bringing an end to manufacturing that began in 1888. The company is recognized by its own history as the oldest U.S. producer of hand-cast, cathedral and opalescent glass.
The company said the decision followed a combination of rising costs, ongoing repairs and operational challenges. KOG had maintained a distinctive manufacturing process based on hand-mixed and hand-produced glass, with hundreds of documented colour recipes, textures and densities developed throughout its history.
The closure affects manufacturing and factory tours, while the company’s Op Shop remains open. KOG’s website confirms that customers can continue to purchase existing glass products and access selected classes and restoration services, although hot-glass activities are no longer being offered.
KOG’s legacy extends beyond its longevity. Its early history is closely connected with Louis Comfort Tiffany, who purchased more than 10,000 pounds of glass from the company in 1893. The company says its glass has also been used in projects and institutions including the Vatican, Frank Lloyd Wright’s Dana House and the White House. 
Source: USGlassMag with additional information added by Glass Balkan
