VitroCom is a trusted supplier of borosilicate, clear fused quartz and synthetic fused silica glass tubing and rods. We’re committed to providing the best service, quality, and prices in the industry, and our dependable and versatile products are widely used in a variety of industrial and medical applications by clients all over the world.
Below is a list of various facts, resources, and links to third-party sources that may be useful for your glass manufacturing projects. We are also pleased to answer any questions you may have or direct you to additional useful information. Please feel free to contact us to speak to a glass manufacturing professional, or to make an appointment to stop by for a site tour or personal consultation.
Glass Properties for Various Glass Compositions
| Glass Properties | Borosilicate | Clear Fused Quartz |
| Thermal Expansion Coefficient (10-7 cm/cm/C° | 32.5 | 5.5 |
| Temperature Strain Point | 510 | 1120 |
| Temperature Softening (°C) | 821 | 1,683 |
| Refractive Index (589.3 mm) | 1,474 | 1,459 |
| Hardness (KNH100) | 418 | 605 |