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Fenton Glassware Are you searching for Fenton Glassware? We are so confident in your total satisfaction that our products are 100% guaranteed..  If you have any questions about a specific product you are trying to find, please e-mail your inquiry to us and we will be happy to assist you.. It is called hard glassed container because it retains it's shape when heated, and does not flow or soften as readily as soft . Boric oxide and alumina is added to the glassed container mix, reducing the coe to 33, and making it react far less to thermal changes. Annealing-after glassed container has been worked with heat, it will have residual stress within from temperature differences. Annealing the process of slowly cooling a completed object in an auxiliary part of the furnace, or in a separate furnace. Acid etching the process of etching the surface of with hydrofluoric acid. Drawing-an essential step in glassblowing, where hot glassed container is pulled to make a longer and thinner piece. Acid etching the process of etching the surface of with hydrofluoric acid. Acid etching was first developed on a commercial scale by richardson acid polishing the process of making a glossy, polished surface by dipping the object, usually of cut , into a mixture of hydrofluoric and sulfuric acids. Lampwork-a form of glassblowing where the glassed container is heated over a flame. They can be produced in great numbers in a short time, compared to wound glassed container beads which must be one at a time. -Stands for "coefficient of expansion" which is a measure of how much a material expands for each degree it is heated, expressed as 104 x 10-7/0c. The object is amber when it emerges from the lehr, but partial reheating causes the affected portion to become or purple.
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