Premier quality Micro-Tec glass coverslips are made from optically clear and special formulated borosilicate glass. Available in thickness #1 (0.13-0.17) in three popular sizes; 18 x 18mm, 22 x 22mm and 24 x 40mm.

Supplied in single packs or boxes of 10 packs (sealed in barrier foil). Main application is microscope cover glass; other applications include thin film substrate and coating test glass.

Specifications of the Micro-Tec glass cover slips

Product #	Type	Thickness	Dimensions	Slide material	Precleaned	Packaging
51-002218-1	Square #1	0.13-0.17mm	18 x 18mm	Borosilicate glass	yes	Pkg/100
51-002218-10	Square #1	0.13-0.17mm	18 x 18mm	Borosilicate glass	yes	Box/1000
51-002222-1	Square #1	0.13-0.17mm	22 x 22mm	Borosilicate glass	yes	Pkg/100
51-002222-10	Square #1	0.13-0.17mm	22 x 22mm	Borosilicate glass	yes	Box/1000
51-002224-1	Rectangle #1	0.13-0.17mm	24 x 40mm	Borosilicate glass	yes	Box/1 ounce (~86)
51-002224-10	Rectangle #1	0.13-0.17mm	24 x 40mm	Borosilicate glass	yes	Box/10 ounce (~860)

Typical chemical composition of borosilicate glass cover slips

Compound	Wt%
SiO2	64.1
B2O	8.4
Al2O3	4.2
Na2O	6.4
K2O	6.9
ZnO	5.9
TiO2	4.0
Sb2O3	0.1

Typical physical properties of borosilicate glass cover slips

Parameter	Value/unit
Light transmission, total solar	92.5%
Refractive index	1.5255 at 546.07nm
Density	2.51 g/cm3
Hardness	6 Mohs scale
Coefficient of expansion	3.3 x 10-6 /°C
Poission's ratio	0.208
Strain Point	529°C
Annealing temperature	557°C
Softening temperature	736°C
Liquidus temperature	820°C