I just bougth some Laser Marking Paper on Amazon (sadly not Xtool selected Materials, besause it was sold out) because id like to try it. I followed the steps, mentioned by Xtool (because the material had no instructions) and use the settings from the library for the selected materials ( Glass with an M1 Laser: 20% Power, 200 mm/s Speed and 100 lines per cm. i also tested 30% power, result in picture) but the result wasn't what i expected: expecially on the edges, the black colour of the engraving came off very easily and even with ligth rubbing (it was nearly nothing) the black colour off the engravings came off. Now i wonder: did i made something wrong? did i cleaned the glass in a wrong way? where the settings false? Or was the marking paper i ordered on Amazon was simply rubbish?