Optical Glass picture, Selected Floatglass
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Selected White Float Glass

Cost-effective, high-quality thin glass

Special Properties

  • Good optical transmittance
  • White, clear appearance at small dimensions
  • Lower content of iron than normal glass
  • Good optical flatness and surface quality
  • Economically priced

Typical Applications

  • Substrates for optical coatings
  • Base glass for antireflection coated windows
  • Electronic displays and components
  • Sight glass applications
  • Machine windows
  • Thin film substrates
  • Sensor Technology
  • Display technology
  • Measuring window
  • Low-cost windows
  • Thin glass applications
  • Glass covers for fire alarm buttons

Our selected float glass is a universal, economically priced, high quality technical glass with excellent optical characteristics. In particular at smaller dimensions, the glass features a white appearance, which is resulting from the low-iron glass composition. Our selected float glass is applied in various technical and optical applications. CNC-processed selected floatglass partsThe good optical performance from the visible to the infrared range, and the high purity with almost no inclusions, make the glass a very versatile material. It proved to be able to substitute expensive materials in many optical applications in the past. The cost savings in such cases often were significant.

The production of thin and very thin glasses by the help of the high quality micro float process, guarantees a good optical flatness, an extremely low deviation from the nominal thickness within each batch, and a very low standard thickness tolerance. A large selection of standard thicknesses beginning at 0,4 mm plus a good surface quality allow an efficient fabrication of many optical components and optics based on this economically priced glass.

In order to request a quotation for windows or substrates made of selected float glass with individual dimensions, please click the button below:

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Transmission Curves of selected Float Glass

0,4 mm glass thickness:

1,0 mm glass thickness:

3,0mm glass thickness:

Refractive Index

  • nd = 1,520 (588 nm)


  • 2,49 g/cm3

Coefficient of Thermal Expansion (0-300 °C)

  • 87 x 10-7

Young's Modulus

  • 70 (±2) GPa

Strain Point

  • 490 °C (± 10 °C)

Hydrolytic Resistance

  • (ISO 719) Class 3
  • (DIN 12.111) Class 3

Electrical Properties

  • Dielectric Constant 7,75 (25 °C ; 1 Mhz)
  • Specific Resistivity 9,7 [Log R (Ω cm)]
    (25 °C ; 1000 Hz)

Stock Thicknesses



0,40 +/-0,05
0,55 +/-0,05
0,70 +/-0,05
0,95 +/-0,05
1,00 +/-0,10
1,25 +/-0,05
1,60 +/-0,10
2,00 +/-0,20
3,00 +/-0,20
4,00 +/-0,20

All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"