Answered By: Regan Brumagen
Last Updated: Mar 04, 2017     Views: 105

Most Pyrex baking ware is not intended to be used on today’s stovetops. At one time, Corning Glass Works made teapots and other products that could be placed on a burner, but they might break if the water boiled away. According to Margaret B. W. Graham in Corning and the Craft of Innovation (Oxford University Press, 2001), p. 376, the "Pyrex line capable of stovetop use...was threatened by the advent of hotter stoves in the 1960s and 1970s." In the American market, "the domestic consumer business [was] still focused on the high-prestige, high-margin ovenware, Corning Ware, [so] a transparent version held little appeal. The French, however, did less cooking in the oven and much more on the top of the stove. The French consumer business needed something that was both more durable than Pyrex and, ideally, cheaper than Corning Ware." Corning Inc. developed a product called "Visions" and brought it to market in 1980. "Visions" is made of transparent glass ceramic and was sold in France, America and other countries in the 1980s to early 1990s. People liked the see-through pots and pans made of glass-ceramics tinted amber or deep purple. Today, "Visions" is popular on e-Bay -- you can find many examples being sold there. In the 1970s Corning introduced "The Counter That Cooks" a rangetop surface made of Pyroceram (glass-ceramics) -- together with glass ceramic pots and pans made to cook food on this flat surface. Corning Inc. no longer makes consumer products (kitchenware/pots & pans). The business was sold to World Kitchen. You can check their website for more information about current kitchen products made of glass or glass-ceramics: http://www.worldkitchen.com/ To make a glass ceramic, the glass is partly crystallizing the glass. Almost any glass formulation can be treated so it crystallizes. The process strengthens glass considerably.  Bruce Adam's book, All About Glass explains the glass-ceramic process in more detail. I attached a bibliography of resources for glass ceramics as well. (I did not update the websites listed) I am not aware of other glass companies making stovetop products. You may wish to try an internet search.