Laser Engraving Ceramic Mugs

Hi, I’m planning to engrave a white ceramic mug with my xTool F1 engraver. However, I’m having a lot of trouble with getting the right settings as I’ve tested out a bunch. Currently, the best outcome has been with 100% power, 300 lines per cm, and speed of 30. But this leads to a noticeable dent in the letters, and it is not dark enough. Does anyone have experience with engraving Ceramic Mug and could help me out with the settings please? Thank you

The laser is 10W (Blue Light) and this is the marking paper I use: NICENEEDED 4 PCS Black Laser Engraving Marking Paper, 39x27CM Laser Dimming Paper Laser Engraving Test Focus Paper, Laser Engraving Material for Glass, Metal Ceramics, DIY Crafts : Amazon.ca: Home