Which type of glass is the most inexpensive?

• A. Flint
• B. High silica
• C. Soft glass
• D. Borosilicate

Answer: (A)

Cost is driven by the raw materials and the complexity of manufacturing. Flint glass corresponds to the common soda-lime or ordinary window glass, made from plentiful ingredients like sand, soda ash, and lime, and it’s produced in huge, well-established quantities with a straightforward process. That combination keeps the price very low compared to the other types. High silica glass requires purer silica and more energy to produce; borosilicate adds boron oxide for heat resistance, which raises cost; the remaining specialized glasses follow the same pattern of higher material and processing costs.