Need guide on engraving ivory

[blokid]

Hi buddies,
I'm newbie of engraving by laser machine.
I tried to engrave ivory with some characters on its surface. After I run, the border of characters no sharp.
Could ya let me know how I can do engrave on ivory material?
I'm using Laser engraving machine (airflow cooling).

Many thanks.

[AmadoDug]

The ivory density is large,what power you used?

[blokid]

I use 70 power, bud

[blokid]

Any guide here?

[alufnino]

Hey,here
I am not familiar with ivory.But I think you should Slowing up