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SCHOTT B 270® Superwhite Soda Lime Glass

Glass Type: Soda lime

Description

SCHOTT B 270® is a crown type Soda lime glass which is fabricated in a drawn process. SCHOTT B 270® is extremely clear and colorless, and has good transmission value into the infrared range. SGP can CNC mill, cut, drill, lap, and polish this material in many shapes, sizes, and surface finishes.

Thermal Properties
Thermal Coefficient of Expansion	(0/300°C): 95X10 -7/°C	Density	2.55 g/cm3
Annealing Point	541°C /1006 °F	Knoop Hardness	542
Softening Point	724°C/ 1335 °F	Young’s Modulus	E=71.5kN/mm2
Strain Point	511°C/ 952 °F	Poisson’s Ratio	.219

Chemical Properties
Hydrolytic Resistance	class 3	Dielectric Constant	E=7
Acid Resistance	class 2	Resistivity	N/A
Alkali Resistance	class 2	Dielectric Strength	N/A

Optical Properties
Refractive Index	1.5230

schott b 270 superwhite glass SCHOTT B 270® Superwhite—a premium, high-purity crown glass—is a specialized class of glass renowned or its exceptional clarity, high solarization resistance, and high optical transmission. Manufactured through a highly controlled up-draw process, this modified soda-lime material offers an unparalleled combination of pristine fire-polished surface quality, outstanding internal homogeneity, and exceptional cost-effectiveness, making it the ultimate choice for a wide range of precision engineering, biotechnology, and optical applications.

Its advanced composition ensures that B 270® completely eliminates the characteristic green tint of standard soda-lime glass, providing a crystal-clear, ultra-white appearance due to its low iron oxide content. Available in various forms, standard sheet sizes, and ultra-thin profiles down to 0.3 mm, it caters to diverse, high-tech industrial needs where broad spectrum clarity from the UV-A range through the visible light and into the Near-Infrared (NIR) spectrum is required.

With an exceptional balance of broad spectral transmission, mechanical versatility, and highly favorable economic scalability, SCHOTT B 270® is widely used across advanced industries requiring absolute precision and reliability without the premium price tag of exotic optical glasses.

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Characteristics of SCHOTT B 270® Superwite Glass:

Broad Spectrum High Transmittance: Delivers a high, flat, and highly consistent luminous transmittance of approximately 91.9% (320 nm to 2600 nm), stretching from UV-A through the visible spectrum into the Near-Infrared.
Ultra-White Optical Clarity: Formulated with ultra-pure raw materials to eliminate the typical iron absorption bands, ensuring a clear, water-white profile free of green tinting.
Excellent Solarization Resistance: Highly stable under intensive sunlight or UV exposure, exhibiting virtually zero color aging or transmission degradation over long periods.
Outstanding Structural Homogeneity: A tightly controlled, uniform refractive index tolerance (+/- 0.001) minimizes wave distortion and guarantees consistent optical performance across all thicknesses.
Pristine Fire-Polished Surfaces: The continuous drawing process yields excellent parallelism and surface smoothness, bypassing the need for costly grinding and polishing in standard cover pane applications.
High Receptivity to Strengthening: A high coefficient of thermal expansion (CTE = 9.4 10-6/K ) and high alkaline content make it exceptionally responsive to both rapid thermal tempering and chemical ion-exchange strengthening.
Certified Biocompatibility: Non-porous and biochemically inert, making it completely safe and stable for delicate biological interfaces and medical environments.
Zero Autofluorescence: Minimizes background noise and signal masking, an essential trait for ultra-clear diagnostics and fluorescence microscopy.
Excellent Coating Interface: The double-sided fire-polished surface provides a clean, pure chemical interface, ideal for the adhesion of anti-reflective (AR) or dielectric optical coatings.

Top Five Industries and Applications of SCHOTT B 270® Glass:

Biotechnology and Life Sciences:
- Substrates for diagnostic lab-on-a-chip systems and microfluidic devices.
- Premium cover slips and plates for highly sensitive fluorescence microscopy.
Consumer Electronics and Optics:
- - High-clarity protective optical filters for camera lenses and action cams.
  - Front panes and cover glass for 3D displays, touch screens, and projection windows.
Industrial Sensors and Metrology:
- - Protective cover glass for industrial light sensors, bar code scanners, and metrology windows.
  - Inspection windows for highly abrasive or UV-intensive manufacturing environments.
Optical Coating and Components:
- - Base substrates for specialized anti-reflective, beam-splitting, and dielectric mirrors.
  - Precision windows for laser welding equipment and copying systems.
- Aviation and Automotive:
  - Head-up display (HUD) combiner glass and protective instrumentation glazing.
  - Cover glass for external optical sensors and high-performance lighting systems.

SCHOTT B 270® Superwhite is an indispensable material that meets the demanding balance of high-end optical performance and cost-conscious innovation. Its broad spectral transmission, pristine surface quality, and freedom from color tinting make it a critical component in cutting-edge technologies across the most active high-tech sectors.

SGP is a trusted leader in precision glass machining and fabrication, backed by years of expertise working with high-performance optical materials like SCHOTT B 270® Superwhite across a wide range of industries and applications.

Whether you’re seeking more information about this versatile material, or need a quote for your specific project, our team is here to help. Contact us today with your questions or requirements—we’re ready to support your application from concept to completion.