H9 / HV1800-2200 Scratch Proof Watch Glass , Double Side Polishing
Sapphire Cover Glass
About sapphire glass
SAPPHIRE CRYSTAL (sapphire glass) generally refers to synthetic
sapphire, generally used in the manufacture of the watch glass.
It is resistant to wear with tungsten titanium alloys and high-tech
ceramics. but sapphire materials can wear resistance and
withstand the strong impact, and some of the same or higher
hardness of the material (e.g., millstone, sandpaper, nail,
concrete wall, and floor, etc.) so sapphire glass are not likely to
scratch the surface of these materials.
Sapphire Glass / Mineral /K one /BK7
Customized according to customers requirement
Round, square, rectangle; flat, dome, curve, bridge ,pot Cover
AR-Coating,Blue, red, green, clearly...... many colors
9H / HV1800-HV2200
As per customer design :Laser engraving/Silk screen printing
High optical production rate
THE ADVANTAGE OF SAPPHIRE CRYSTAL GLASS
- Scratch resistance
- Abrasion resistance
- High mechanical strength
- High temperature resistance
- Good thermal stability
- High optical production rate
Color: Blue, Purple, Transparent, Neutral, Gray-Blue, Smoke, Tea
Layers: 3~10 layers
Single side OR both side
Electroplating / Metallization
Color: Black, Golden, Pink Golden, Blue...
These round sapphire glass crystals come in a variety of
thicknesses and diameters, are nearly unbreakable crystals making
them highly prized by watchmakers. These watch crystals can be
glued into most watch cases or pressure fit into most plastic watch
crystal gaskets. Each sapphire watch crystal comes with a slightly
polished bevel edge to give the watch crystal a nice finished look
once it has been installed. These generic sapphire glass crystals
can be used to replace the watch crystals of almost every name
brand watch popular today, especially high-end watch crystals like
those in Rolex watches, saving you both time and money.
Please try to offer more details as below when you place an order:
1. Buyer offers an original sample or related mounting parts and
special request for attention or change.
2. If you are unable to provide samples, please provide drawings or
try to provide more details.
We can provide flat/single domed/double domed and other shape watch
glass,Welcome to email us.
Synthetic Sapphire Window Technique Index :
|Edge Finish||Ground and beveled|
|Surface Quality||40-20 scratch-dig|
|Surface Flatness||λ/4 @ 633 nm|
|Parallelism||≤3 arc min (≤0.9 mrad)|
|Clear Aperture||>80% of central diameter|
|Hardness (Knoop)||1370 kg mm-2|
|Young's modulus||3.4 x 1011 N m-2|
|Thermal Limit||22 W m-1 K-1|
|Thermal expansion coefficient||8.4 x 10-6 K-1|