Because it is soft
hardness
hardness
Writing on wax presented several disadvantages, primarily due to its fragility and susceptibility to damage. The wax surface could easily be scratched or smudged, leading to loss of information or readability. Additionally, wax tablets were limited in terms of the amount of text they could hold, making them less practical for extensive documentation. Finally, the need for a stylus for writing and the potential for the wax to melt or deform under heat further complicated their use.
hardness is how easily a mineral can be scratched
The term for this is "hardness".
No, this microwave cannot be scratched easily. Even if scratched with sharp object, only the paint will come off.
Hardness, how easily it can be scratched
Hardness
Gypsum is a mineral commonly found in drywall that is easily scratched due to its low hardness on the Mohs scale of mineral hardness.
Gypsum (number 2 on the Moh's Hardness Scale)
Talc is the softest mineral and can be scratched by any other mineral.
A hard material is not easily scratched, as its strong structure makes it resistant to scratches. Examples of hard materials include diamond and sapphire, which are known for their durability and scratch resistance.