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fiberglass and soda-lime glass

Glass making falls into two primary categories—fiberglass and soda-lime glass by which Carmeuse provides lime and milled limestone for the production process.

Fiberglass

Fiberglass is a material fabricated from extremely fine fibers of glass and is used in a variety of applications ranging from household insulation to a reinforcing agent in ladders and automotive body panels.

Glass fibers are categorized into two segments:

  • Fiberglass or glass wool used primarily for insulation
  • Continuous fibers used in reinforcements such as chopped strands and fabrics.

Quicklime is used in glass production as a flux for modifying viscosity. Most importantly, milled limestone increases the final product durability and chemical wear resistance.

Soda Lime Glass

Soda-lime glass is typically made using a wet batch process where the composition is normally 5-12% lime, 12-18% soda, and 60-75% silica.  A small percentage of other materials can be added to modify product color, such as cobalt to make blue colored containers.

Soda-lime glass is typically made into containers and flat glass. Up to 90% of the world glass production is the soda-lime type.

Quicklime is used in glass production as a flux for modifying devitrification and viscosity along with increasing the final product durability and chemical wear resistance..

Most importantly, milled limestone increases the final product durability and chemical wear resistance.  Without milled limestone, soda glass would dissolve in water.

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