The scissor blades were marked using a 20 watt q-switched ytterbium fiber laser, along with a 160mm focal length lens. The blades were marked with a dark surface mark. Each mark was made with the intention of keeping the cycle at or below 4 seconds. The blades were marked as dark as possible within the allotted cycle time of 4 seconds. But of course with more time the marks can be darker, as seen with the Gerber marks on the saw blades.