When you choose an image you’d like to mark on metal, or any substrate, it’s important to start off with a high-quality image — 300 DPI or above.
If the image is a bitmap, the Mode (in the Image menu on CorelDRAW) needs to be changed to grayscale for most metals.
Go to Image >Adjustments>Desaturate to remove the color.
Convert the image to an RGB-color profile, if not already. Depending on the contrast of the image, increase the black level and decrease the white for more contrast.
Pro tip: Images with higher contrast mark better.
Learn more about achieving a high-quality image on metal using a laser.