Product Information
Colorless Borosilicate Glass for flawless Miscroscopy

D 263® M is a colorless borosilicate glass that SCHOTT manufactures with the help of a special down-draw method. It is available from stock in various sheet sizes and thicknesses ranging from 0.1 mm to 0.21 mm.

D 263® M is the perfect choice as cover glass for microscopic analysis and meets the requirements specified in ISO 8255-1.

The chemical composition of D 263® M ensures valid and reliable research results due to its low auto-fluorescence and high chemical resistance.

Advantages
• High luminous transmittance
• Colorless appearance
• Excellent cosmetic quality
• Easy to cut
• Outstanding flatness
• Resistant to chemical attacks
• Refractive index finely tuned to microscopes
• Low autofluorescence
• Easy to separate in automatic cover-slipping equipment thanks to its protective coating
• Precise thickness control
• Resistance to environmental conditions ensures high durability
• Good cell growth
• Thicknesses available for high-performance applications

Technical Data

Dimensions : 410 mm x 435 mm
410 mm x 415 mm
410 mm x 710 mm
Thicknesses : 0.10 mm up to 0.21 mm
Luminous transmittance τvD65 (d = 0.15 mm) : 91.7%
Coefficient of mean linear thermal expansion
α (20 °C; 300 °C) (static measurement) : 7.2 ⋅ 10-6 K-1
Transformation temperature Tg : 557 °C
Dielectric constant εr at 1 MHz : 6.7
Refractive index nD : 1.5230
Refractive index ne : 1.5255
Density ρ (annealed at 40 °C/h) : 2.51 g/cm3

Options : for microscopes