<
scratch-res
>
This test serves to prove the scratch resistance of visible front surfaces of cases, keys, displays, letterings, stickers, etc. The test can be carried out with the Erichsen hardness test bar.
Figure 74: Structure of scratch resistance
Example for content:
Type of test bar:
Type 318
Diameter of penetrator:
d diameter of penetrator
ABS = 0,75 mm
Load:
F load
ABS = 5 N
Test temperature:
T
P
Test temperature
ABS = 23 °C -/+ 5 K
Evaluation criteria
Output criteria:
After the test, there should not be any visible surface damage.