Materials

Fused borosilicate glass is a tough, heat-resistant glass widely used for making pressed lamp shades. Its key advantage is a very low thermal expansion coefficient. This means it expands and contracts much less than regular glass when heated or cooled. Consequently, it withstands sudden temperature changes extremely well – crucial when a hot bulb turns on or off inside a shade. It’s also highly resistant to chemicals, durable, and remains transparent over time. These properties make it a reliable and safe choice, especially for demanding industrial or high-heat lighting applications where ordinary glass might crack.

Fused borosilicate glass excels in pressed lamp shades due to its key strengths:

Superior Heat Resistance: It handles the high heat of light bulbs without cracking or warping, even during sudden temperature changes when turning lights on/off. Ordinary glass risks thermal shock failure.

Exceptional Durability: It’s much harder and more resistant to scratches, impacts, and chemicals than regular soda-lime glass. This makes shades tougher during handling, cleaning, and use.

Stability During Pressing: Its specific viscosity and thermal properties allow it to be pressed into complex, detailed shapes more effectively and hold those shapes precisely as it cools without distorting.

Long-Term Clarity & Safety: It resists clouding or weathering over time and maintains its transparency. Crucially, its strength and thermal resistance minimize the risk of dangerous breakage near hot bulbs.