Plus additional oxides and colorants depending on the product line being produced. In general, this ceramic-glass family is composed approximately, as calculated from precursor glass batches in percent by weight on an oxide basis, of: Additionally, it is completely dishwasher safe and is not prone to haze or etching typically experienced with normal glass kitchenware. Since the material is completely non-porous, it will never harbor food odors or leach chemicals into meals. Thanks to Calexium's extremely high thermal shock resistance, food can be stored in the freezer in a piece of Visions and immediately taken to the stovetop or oven for cooking. In a further patent, filed in 1976, Kenneth Chyung described it as an ideal material for cookware and kitchen materials and "unquestionably better" in the areas of infra-red transmittance, stain resistance, and chemical durability than two existing Pyroceramic glasses used for Corning Ware and "The Counter That Cooks". It was described as being a semi-crystalline ceramic having unique and useful properties such as coefficient of thermal expansion so low as to be negative in character, a true porosity of zero, and the unusual characteristic of being transparent despite a substantial crystal content (often greater than 75% by volume). Donald Stookey, of the Corning Research and Development Division, in 1958. This material and a method of making it was first referenced in a patent filed by S. Visions cookware is made of a transparent, beta-quartz material called Calexium, belonging to the Pyroceram family of glass-ceramics. Visions was temporarily unavailable in the United States from 2004 until 2006 but has otherwise been produced non-stop for nearly 40 years and is currently sold worldwide by Corelle Brands, LLC. A white variation was available in Europe as "White Visions" and in the US in limited supply under the name "Pyromax". Typically seen in an amber tint, a cranberry colored version was available from 1992 until 2004. Visions has remained popular overseas, particularly in the Asia-Pacific region where custom product lines have been created specifically for that market. Sales declined in the US over the 1990s and early 2000s and the product line is now sold at higher end price points via "CorningWare, Corelle, & More" outlet stores and Corelle Brands websites. ĭuring the late 1980s and early 1990s, Corning released additional Visions products lines including limited "Sculptured" versions for high-end dept stores, non-stick versions featuring a Silverstone coating, and additional colors. Due to increased demand, Corning opened additional production lines in the US and Brazil.
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Sales spiked during the mid-1980s when Corning released a series of television commercials showing a traditional piece of metal cookware being melted inside a transparent Visions pot, touting the product line as withstanding heat that will "turn ordinary sauce pans into sauce." It would become the number one selling cookware set for the next several years. Once the trademark obstacles were overcome, the product finally received an official rollout in the second half of 1983 under the name “VISIONS”. In 1981, Corning Glass Works began test marketing the cookware in the United States as an imported product under the name “Le CLAIR” rather than VISION due to a trademark conflict over the name. It was produced in France and released for the European market in 1979 to instant success. In 1977, Andre Andrieu and Serge Renault working for Corning France, patented the claim that would form the basis for amber-tinted, transparent Vision cookware. However, by 1966 Corning decided against commercializing it for fear that it would cannibalize Pyrex sales. In 1963 George Beall, working under Stookey, explored a method for making transparent cookware. While Pyroceram would quickly go on to be used for a variety of products, including Corning Ware cookware, the transparent version (later to be known as Calexium) was heavily studied over the next two decades. Included in his subsequent patents were references to a transparent variation of this material, as well. Donald Stookey of the Corning Research and Development Division discovered Pyroceram, an opaque-white glass-ceramic material with a high thermal shock resistance.
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