Why is boric acid used in glass industry?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Boric Acid in Glass Manufacturing**: Boric acid, specifically in the form of boric oxide (B2O3), is increasingly being used in the glass industry. Manufacturers typically add about 5 to 20 percent of boric oxide to the silica base used for glass production.

2. **Lowering Melting Temperature**: One of the primary reasons for adding boric oxide is that it lowers the melting temperature of silica. This reduction in temperature is beneficial as it decreases the energy required for melting, which in turn saves fuel costs during the glass manufacturing process.

3. **Decreasing Viscosity**: The addition of boric oxide also affects the viscosity of the molten glass. It decreases the viscosity, making it easier to shape and mold the glass during production.

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