11. Soda-lime glass is relatively inexpensive, chemically stable, reasonably hard, and extremely workable. 12. Pyrex glass cookware manufactured by World Kitchen is made of tempered soda-lime glass instead of borosilicate. 13. Obsidian still has about the same SiO2 content as normal soda-lime glass , ~ 75 %. 14. The resulting glass contains about 70 to 74 % silica by weight and is called a soda-lime glass . 15. For instance, quartz has very low thermal expansion, while soda-lime glass has very high thermal expansion. 16. Silicates are also in whiteware ceramics such as porcelain, and in traditional quartz-based soda-lime glass . 17. However, depending on the application, soda-lime glass substrates of similar thicknesses are also used in OLED fabrication. 18. It is also less likely to crack while working with it in making pieces of variable thickness than is soda-lime glass . 19. Silicates are used in whiteware ceramics such as porcelain, and in traditional quartz-based soda-lime glass and many other specialty glasses. 20. Pyrex sold in the United States is made of tempered soda-lime glass ; outside of North America the costlier borosilicate is still used.
