Watch Case Back Material Scratch Hardness Guide
作者: Funny Items
发布时间: 2026-08-21 22:39:17
查看数: 50
Scratch Hardness
Watch case back material scratch hardness determines resistance to surface damage.
Hardness Guide
- Steel: 5-6 Mohs
- Titanium: 6-7 Mohs
- Ceramic: 8-9 Mohs
- Sapphire: 9 Mohs