Optical Glass picture, Selected Floatglass
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Selected White Float Glass

Low-cost high quality thin glass

Special Properties

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

Typical Applications

Our selected float glass is an universal, economically priced high quality technical glass with excellent optical characteristics. In particular at smaller dimensions, the glass features a white appearance, resulting from the low iron glass composition. Our selected float glass is used in various technical 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, that proofed to be able to substitute expensive materials in many optical applications in the past. The production of thin and very thin glass by the high quality micro float process, guarantees a good flatness, extreme low deviation from the nominal thickness within each batch, and a very low standard thickness tolerance compared to other glass manufacturing processes. A large selection of standard thicknesses beginning at 0,4mm and a good surface quality allow an efficient fabrication of many different optical components based on this low cost material.

To request windows or substrates made of our selected Float Glass with individual dimensions, please click the button below:

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Transmission Curves of sleceted Float Glass

0,4mm glass thickness:

1,0mm glass thickness:

3,0mm glass thickness:

Refractive Index

  • nd = 1,520 (588nm)


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

Stock Thicknesses





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

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