I had to use 20% to get any results and they where not very good. The person that answered the phone suggested a speed of 75 and a power of 10. When they arrived I called and asked them what settings I should use with my 80 watt laser. I have always heard good things about pictures on marble, so I ordered two cases of 6圆 tiles from Laser Sketch. So,then I figured the next step would be marble. I downloaded the trial version of One Touch laser photo and was able to get a pretty decent picture on a piece of Alder and some black anodized aluminum. Being a newbie, I was having trouble getting a photo to look decent on ANYTHING other than the computer screen.
